Restriction Practice

A restriction requirement is a formal USPTO action under 35 U.S.C. § 121 requiring an applicant to elect between two or more 'independent and distinct' inventions claimed in a single patent application. WHY RESTRICTION EXISTS: the USPTO charges a fee per application and pays each examiner to examine a set number of claims; allowing an applicant to claim many unrelated inventions in one application would require the examiner to search multiple technology areas without additional compensation; restriction requirements exist partly as a resource-management mechanism; WHEN ARE INVENTIONS 'INDEPENDENT AND DISTINCT': TWO-PRONG TEST: (1) the inventions must be independent (no overlapping structure or steps between them) OR distinct (they overlap but the examiner can show separately patentability); (2) there must be a serious burden on the examiner if restriction is not required; COMMON RESTRICTION SCENARIOS: (1) COMBINATION AND SUBCOMBINATION: an applicant claims both a combination (A+B) and a subcombination (B alone); restricted when subcombination B has utility apart from A and when A has a material difference from B; (2) PRODUCT AND PROCESS: a product claim and a process of making/using that product are generally related but may be restricted if the process can be practiced with a different product; (3) PRODUCT AND PROCESS OF USE: same analysis; (4) SPECIES: an applicant claims multiple species within a genus; the examiner may require election of a single species (election of species restriction); after examination of the elected species, the examiner may open examination to the genus if it is allowable over the prior art.

USPTO restriction requirements fall into several distinct categories: (1) PRODUCT VS. METHOD OF MAKING: product claim (composition, apparatus, device) and a method of making that product; restricted when the method can be practiced with a materially different product; 'materially different' means the claimed product is not the only means of performing the claimed method; if the product is the only practical way to perform the method, restriction may be improper; (2) PRODUCT VS. METHOD OF USE: product claim and a claim to a method of using that product; restricted when the method of use can be practiced with materially different products; again, if the product is the only suitable product for the method, restriction may be improper; (3) INDEPENDENT INVENTIONS: two or more completely independent invention groups with no overlapping structure or steps; example: Invention Group 1 = an improved engine; Invention Group 2 = a separate fuel additive composition; no structural overlap → independent; (4) COMBINATION VS. SUBCOMBINATION: the subcombination (component B alone) has utility apart from the combination (A+B); example: Invention Group 1 = a chemical compound; Invention Group 2 = a pharmaceutical composition containing that compound; the compound may have utility as a chemical reagent independent of the pharmaceutical use; (5) ELECTION OF SPECIES: within a genus claim, the examiner identifies multiple species and requires election of one; the applicant can elect a single species; if the elected species is allowed, the examiner opens examination to the genus and other species if covered by the allowed genus; if the genus is rejected but the elected species is allowable, the applicant may need divisionals for the non-elected species.

Traversing (arguing against) a restriction requirement is often worth considering, but the analysis depends on the specific restriction: WHEN TRAVERSAL IS WORTHWHILE: (1) the examiner's groupings are incorrect (inventions are not actually independent and distinct); (2) there is no serious burden on the examiner to examine all groups together (e.g., a single prior art search covers all groups); (3) the restriction would result in loss of an important claim type that would be valuable if included in the main application; WHEN TO ACCEPT THE RESTRICTION: (1) the restriction is clearly proper (the groups are genuinely independent with no overlap); (2) traversal delays prosecution without a realistic chance of success; (3) the applicant intends to file divisionals for all groups anyway, so the § 121 safe harbor is more important than avoiding the restriction; (4) the prosecution budget is limited and traversal would increase costs; HOW TO TRAVERSE: the traversal must be included WITH the election response (cannot be filed separately later); the traversal must explain specifically why the restriction is improper (not just state 'the restriction is improper'); argue the specific prong that fails (the inventions are not independent because they share structure X, or there is no serious burden because a single search would cover all groups); THE COST OF TRAVERSAL: examiners almost always maintain restriction requirements even after traversal; traversal is rarely successful but creates a record; the primary value of traversal is maintaining the argument for potential petitions to the Director (rare); IMPORTANT: failure to traverse does NOT waive divisional application rights — the applicant can still file divisionals for all non-elected inventions.

Election of species (EOS) is a specific type of restriction requirement that occurs when a patent application claims a broad genus and multiple specific species within that genus: THE EOS PROCESS: (1) EXAMINER'S REQUIREMENT: the examiner identifies multiple species and requires the applicant to elect one species for initial examination; typically the examiner will identify 3–5 species and allow the applicant to elect one; (2) APPLICANT'S ELECTION: the applicant elects one species (the one most likely to be commercially important and most likely to be allowable over prior art); (3) INITIAL EXAMINATION — ELECTED SPECIES: the examiner searches only the elected species; if the elected species is rejected, prosecution proceeds on that species only until it is either allowed or final rejection; (4) OPENING EXAMINATION TO GENUS: if the elected species claim is allowed (or a claim generic to the elected species is allowed), the examiner will then examine the genus claim and non-elected species claims; if the genus would be obvious over the prior art that was found against the non-elected species, the genus may be rejected; IMPORTANT DISTINCTION: in an EOS restriction (unlike product/method restriction), the applicant does NOT automatically have the right to pursue non-elected species in divisional applications; divisional rights for species are more limited; the key question is whether the genus is eventually allowed, because that would cover all species; STRATEGIC ELECTION: elect the species that is most commercially important AND most different from any known prior art; the examiner will search that species, and the prior art found affects the genus; elect wisely.

Restriction requirements in U.S. practice have international counterparts — but the rules differ significantly: U.S. RESTRICTION vs. UNITY OF INVENTION (PCT/EPO): the USPTO restriction requirement is based on 'independent and distinct' inventions; the PCT (and EPO) use a 'unity of invention' standard, which is slightly different; unity requires that claims relate to a single general inventive concept — inventions can be linked by a common technical feature; the unity standard is generally broader than the U.S. 'independent and distinct' standard, meaning fewer restrictions/objections in PCT/EPO; IMPLICATIONS FOR PCT APPLICANTS: a PCT application typically avoids the most restrictive U.S. requirements during the international phase; upon national phase entry in the U.S. (35 U.S.C. § 371), the USPTO will examine the application under U.S. standards and may issue a restriction requirement that was not required in the international phase; applicants who paid additional fees for the PCT international search to cover multiple inventions may still face restriction in the U.S. national phase; DIVISIONALS IN OTHER JURISDICTIONS: most major patent offices allow divisional applications (EPO: divisional within pending parent; JPO: divisional at response to restriction equivalent; CNIPA: similar); timing and procedure vary; GLOBAL PORTFOLIO STRATEGY: when planning a global IP portfolio, consider which jurisdictions will allow all invention groups in one application vs. require divisionals; factor in the cost of multiple parallel national-phase applications for each divisional invention group.