Prosecution Insights
Last updated: April 19, 2026
Application No. 18/261,733

MICROALGAE CALCAREOUS COMPOSITIONS AND USES THEREOF

Non-Final OA §101§102
Filed
Jul 17, 2023
Examiner
FIEBIG, RUSSELL G
Art Unit
1655
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Miyoshi Europe
OA Round
1 (Non-Final)
63%
Grant Probability
Moderate
1-2
OA Rounds
3y 1m
To Grant
89%
With Interview

Examiner Intelligence

Grants 63% of resolved cases
63%
Career Allow Rate
546 granted / 870 resolved
+2.8% vs TC avg
Strong +26% interview lift
Without
With
+25.8%
Interview Lift
resolved cases with interview
Typical timeline
3y 1m
Avg Prosecution
48 currently pending
Career history
918
Total Applications
across all art units

Statute-Specific Performance

§101
13.1%
-26.9% vs TC avg
§103
38.8%
-1.2% vs TC avg
§102
9.2%
-30.8% vs TC avg
§112
28.4%
-11.6% vs TC avg
Black line = Tech Center average estimate • Based on career data from 870 resolved cases

Office Action

§101 §102
DETAILED ACTION Notice of Pre-AIA or AIA Status The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . Applicant’s election with traverse of Group III, claims 21-22, in the reply filed on 5 February 2026 is acknowledged. Applicant traverses the restriction requirement, first because Group I, Group II and Group III are not distinct inventions, as they all relate to a cosmetic, a personal care, a pharmaceutical or a nutraceutical composition comprising Thoracosphaera heimii calcispheres or microalgae and methods for producing them. Tangen, however, does not relate to a cosmetic,personal care, a pharmaceutical or a nutraceutical composition comprising Thoracosphaera heimii calcispheres or microalgae. In addition, Applicant traverses this restriction requirement based on lack of unity determination because the Office Action's lack of unity determination is contrary to the position of the International Searching Authority (ISA). The present application is a National Stage of PCT/EP2022/051788, and the ISA considered the same prior art reference, the same PCT rules, and similar claims. However, the ISA did not determine the unity of invention to be lacking. Thus, as evidenced by the ISA decision, the claims do not lack unity of invention, and withdrawal of the restriction requirement is respectfully requested. Both argument are unpersuasive. Firstly, because a recitation of the intended use of the claimed invention must result in a structural difference between the claimed invention and the prior art in order to patentably distinguish the claimed invention from the prior art. If the prior art structure is capable of performing the intended use, then it meets the claim. Secondly, the opinions of the ISA are not binding on USPTO practice. Claims 12-20 are withdrawn as being directed to a nonelected invention. Claims 21-22 are presented for examination on the merits. Claim Rejections - 35 USC § 101 35 U.S.C. 101 reads as follows: Whoever invents or discovers any new and useful process, machine, manufacture, or composition of matter, or any new and useful improvement thereof, may obtain a patent therefor, subject to the conditions and requirements of this title. Claims 21-22 are rejected under 35 U.S.C. 101 because the claimed invention is directed to a judicial exception (i.e., a law of nature, a natural phenomenon, or an abstract idea) without significantly more. Claim 21 (and claims dependent thereon) are directed to a composition comprising natural products. The claim(s) does/do not include additional elements that are sufficient to amount to significantly more than the judicial exception. Effective January 7, 2019, subject matter eligibility determinations under 35 U.S.C. § 101 follow the procedure explained in the Federal Register notice titled 2019 Revised Patent Subject Matter Eligibility Guidance (Federal Register, Vol. 84, No.4, 50-57), which is found at: https://www.govinfo.gov/content/pkg/FR-2019-01-07/pdf/2018-28282.pdf. Applicants are kindly asked to review this guidance as well as MPEP 2106. The statutory categories of invention under 35 U.S.C. 101 are processes, machines, manufactures, and compositions of matter. However, certain members of these categories constitute judicial exceptions, i.e., the courts have determined that these entities are not patentable subject matter. These judicial exceptions include abstract ideas, laws of nature, and natural phenomena. The Office released guidance on December 16, 2014 for the examination of claims reciting natural products under 35 U.S.C. 101 in light of the recent Supreme Court decisions in Association for Molecular Pathology v. Myriad Genetics, Inc. (569 U.S. ___, 133 S. Ct. 2107, 2116, 106 USPQ2d 1972 (2013)) and Mayo Collaborative Services v. Prometheus Laboratories (566 U.S. ___, 132 S. Ct. 1289, 101 USPQ2d 1961 (2012)), Diamond v. Chakrabarty, 447 U.S. 303 (1980)) and Funk Brothers Seed Co. v. Kalo Inoculant Co. - 333 U.S. 127 (1948)). (inter alia). See eg. MPEP 2106.04(b) The Supreme Court has explained that the judicial exceptions reflect the Court’s view that abstract ideas, laws of nature, and natural phenomena are "the basic tools of scientific and technological work", and are thus excluded from patentability because "monopolization of those tools through the grant of a patent might tend to impede innovation more than it would tend to promote it." Alice Corp., 134 S. Ct. at 2354, 110 USPQ2d at 1980 (quoting Myriad, 133 S. Ct. at 2116, 106 USPQ2d at 1978 and Mayo Collaborative Servs. v. Prometheus Labs. Inc., 566 U.S. 66, 71, 101 USPQ2d 1961, 1965 (2012)). The Supreme Court’s concern that drives this "exclusionary principle" is pre-emption. Alice Corp., 134 S. Ct. at 2354, 110 USPQ2d at 1980. The Court has held that a claim may not preempt abstract ideas, laws of nature, or natural phenomena; i.e., one may not patent every "substantial practical application" of an abstract idea, law of nature, or natural phenomenon, even if the judicial exception is narrow. While preemption is the concern underlying the judicial exceptions, it is not a standalone test for determining eligibility. Rapid Litig. Mgmt. v. CellzDirect, Inc., 827 F.3d 1042, 1052, 119 USPQ2d 1370, 1376 (Fed. Cir. 2016). Instead, questions of preemption are inherent in and resolved by the two-part framework from Alice Corp. and Mayo (the Alice/Mayo test referred to by the Office as Steps 2A and 2B). It is necessary to evaluate eligibility using the Alice/Mayo test, because while a preemptive claim may be ineligible, the absence of complete preemption does not demonstrate that a claim is eligible. Products of Nature: When a law of nature or natural phenomenon is claimed as a physical product, the courts have often referred to the exception as a "product of nature". Products of nature are considered to be an exception because they tie up the use of naturally occurring things, but they have been labeled as both laws of nature and natural phenomena. See Myriad 133 S. Ct. at 2116-17, 106 USPQ2d at 1979 (claims to isolated DNA held ineligible because they "claim naturally occurring phenomena" and are "squarely within the law of nature exception"); Funk Bros. Seed Co. v. Kalo Inoculant Co., 333 U.S. 127, 130, 76 USPQ 280, 281 (1948) (claims to bacterial mixtures held ineligible as "manifestations of laws of nature" and "phenomena of nature"). Step 2A of the Office’s eligibility analysis uses the terms "law of nature" and "natural phenomenon" as inclusive of "products of nature". PNG media_image1.png 18 19 media_image1.png Greyscale It is important to keep in mind that product of nature exceptions include both naturally occurring products and non-naturally occurring products that lack markedly different characteristics from any naturally occurring counterpart. Instead, the key to the eligibility of all non-naturally occurring products is whether they possess markedly different characteristics from its closest naturally occurring counterpart. PNG media_image1.png 18 19 media_image1.png Greyscale When a claim recites a nature-based product limitation, examiners use the markedly different characteristics analysis discussed in MPEP § 2106.04(c) to evaluate the nature-based product limitation and determine the answer to Step 2A. Nature-based products, as used herein, include both eligible and ineligible products and merely refer to the types of products subject to the markedly different characteristics analysis used to identify product of nature exceptions. The Markedly Different Characteristics Analysis The markedly different characteristics analysis is part of Step 2A, because the courts use this analysis to identify product of nature exceptions. If the claim includes a nature-based product that has markedly different characteristics, then the claim does not recite a product of nature exception and is eligible. If the claim includes a nature-based product that does not exhibit markedly different characteristics from its closest naturally occurring counterpart in its natural state, then the claim is directed to a "product of nature" exception (Step 2A: YES), and requires further analysis in Step 2B to determine whether any additional elements in the claim add significantly more to the exception. PNG media_image1.png 18 19 media_image1.png Greyscale Nature-based Product Claim Analysis PNG media_image1.png 18 19 media_image1.png Greyscale Where the claim is to a nature-based product by itself, the markedly different characteristics analysis should be applied to the entire product. PNG media_image1.png 18 19 media_image1.png Greyscale Where the claim is to a nature-based product produced by combining multiple components, the markedly different characteristics analysis should be applied to the resultant nature-based combination, rather than its component parts. Where the claim is to a nature-based product in combination with non-nature based elements, the markedly different characteristics analysis should be applied only to the nature-based product limitation. For a product-by-process claims, the analysis turns on whether the nature-based product in the claim has markedly different characteristics from its naturally occurring counterpart. The markedly different characteristics analysis compares the nature-based product limitation to its naturally occurring counterpart in its natural state. Markedly different characteristics can be expressed as the product’s structure, function, and/or other properties, and are evaluated based on what is recited in the claim on a case-by-case basis. If the analysis indicates that a nature-based product limitation does not exhibit markedly different characteristics, then that limitation is a product of nature exception. If the analysis indicates that a nature-based product limitation does have markedly different characteristics, then that limitation is not a product of nature exception. PNG media_image1.png 18 19 media_image1.png Greyscale Because the markedly different characteristics analysis compares the nature-based product limitation to its naturally occurring counterpart in its natural state, the first step in the analysis is to select the appropriate counterpart(s) to the nature-based product. PNG media_image1.png 18 19 media_image1.png Greyscale When there are multiple counterparts to the nature-based product, the comparison should be made to the closest naturally occurring counterpart. When the nature-based product is a combination produced from multiple components, the closest counterpart may be the individual nature-based components of the combination. Because there is no counterpart mixture in nature, the closest counterparts to the claimed mixture are the individual components of the mixture, i.e., each naturally occurring species by itself. See, e.g., Funk Bros., 333 U.S. at 130, 76 USPQ at 281 (comparing claimed mixture of bacterial species to each species as it occurs in nature). Markedly changed characteristics can include structural, functional, chemical changes. In order to show a marked difference, a characteristic must be changed as compared to nature, and cannot be an inherent or innate characteristic of the naturally occurring counterpart or an incidental change in a characteristic of the naturally occurring counterpart. Myriad, 133 S. Ct. at 2111, 106 USPQ2d at 1974-75. Thus, in order to be markedly different, applicant must have caused the claimed product to possess at least one characteristic that is different from that of the counterpart. PNG media_image1.png 18 19 media_image1.png Greyscale If there is no change in any characteristic, the claimed product lacks markedly different characteristics, and is a product of nature exception. The claims are directed to a composition comprising nature-based components (i.e. Thoracosphaera heimii calcispheres), [in fact the composition can included 100% of the calcispheres, that is – not but Thoracosphaera heimii calcispheres) which is not markedly different from its closest naturally-occurring counterpart because there is no indication that their combination or preparation has caused the nature-based product to have any characteristics that are markedly different from the closest naturally-occurring product and the claims do not include additional elements that are sufficient to amount to significantly more than the judicial exception. The rationale for this determination is explained below: Step 1: Determine if the claims are directed to one of the four statutory categories of patentable subject matter identified by 35 U.S.C. 101: a process, machine, manufacture or composition of matter. YES, the claims are directed to a composition of matter, which is a statutory category within at least one of the four categories of patent eligible subject matter. Step 2A: PRONG ONE: Evaluate whether the claim recites a Judicial Exception (e.g., law of nature, natural phenomenon, or an abstract idea). YES, the claims are product claims reciting something that appears to be a nature-based product (i.e., Thoracosphaera heimii calcispheres) which is not markedly different from the closest naturally-occurring counterpart (i.e., the individual nature-based products). Note: with respect to extracts of natural products such as plants, the closest naturally-occurring counterpart is always the same compounds found in the extract, present in the non-isolated form in the source plant material. Extracts that are made simply by separating the extracted components from the non-extracted components, is a partitioning process that absent any specific chemical modification, merely separates the compounds leaving their activities unchanged. Ingredients recited in the claims are natural products that would occur naturally; thus, the claims involve the use of judicial exceptions. There is no indication in the record of any markedly different characteristics (either structural or functional) of the composition as broadly claimed. For example, there is no evidence of record of a structural difference between the extract(s) in the claimed composition and that of their nature-based counterparts. Consequently, the claimed compositions are structurally the same as their closest naturally- occurring counterparts. Nor is there any difference in functional characteristics. To show a marked difference, the characteristic(s) must be changed as compared it closest natural-occurring counterpart. For example, and assertion of changed functionality must be accompanied with evidence of a comparison of the claimed composition with its closest naturally-occurring counterpart and should apply to the full scope of the claim. Furthermore, inherent or innate characteristics of the naturally occurring counterpart cannot show a marked difference. Likewise, differences in the characteristics that came about or were produced independently of any effort or influence by Applicant cannot show a marked difference. The recitation of specific amounts of the ingredients does not affect this analysis because it is well known and routine in the art to mix specific amounts of active ingredients with additional ingredients. Therefore, the claim is not meaningfully limited and does not amount to significantly more than each product of nature by itself. Finally, the claimed mixture is like the novel bacterial mixture of Funk Brothers, which was held ineligible because each species of bacteria in the mixture (like each component in the instantly claimed mixture) continued to have “the same effect it always had”, i.e., it lacked markedly different characteristics. Funk Brothers Seed Co. v. Kalo Inoculant Co., 333 U.S. 127, 131 (1948), discussed in Myriad Genetics, 133 S. Ct. at 2117. While not discussed in the opinion, it is noted that several of the claims held ineligible in Funk Brothers recited specific amounts of the bacterial species in the mixture, e.g., claims 6, 7 and 13. Funk Brothers, 333 U.S. at 128 n.1. Thus, there is no evidence of record to indicate that the claimed product is markedly different, structurally, chemically, functionally, than its closest naturally occurring counterpart. PRONG TWO: Evaluate whether the judicial exception is integrated into a practical application. The claims are directed to a composition, not its practical use such as a particular treatment or prophylaxis for a disease or medical condition. Thus the cited claims are directed to a judicial exception to patentable subject matter. Step 2b: Determine whether the claim directed to a judicial exception provides an inventive concept. For example, the claims may recite additional elements that amount to significantly more than the judicial exception. In the instant case, NO, the claims are directed to an extract composition without any other components that could add significantly more to the exception. No other specific limitations other than what is well-understood, routine and conventional in the field at a high level of generality have been added to the claimed nature-based product (e.g., addition of well-known ingredients). Thus, the claimed product is not eligible subject matter under current 35 USC 101 standards. Claim Rejections - 35 USC § 102 In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis (i.e., changing from AIA to pre-AIA ) for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. The following is a quotation of the appropriate paragraphs of 35 U.S.C. 102 that form the basis for the rejections under this section made in this Office action: A person shall be entitled to a patent unless – (a)(1) the claimed invention was patented, described in a printed publication, or in public use, on sale, or otherwise available to the public before the effective filing date of the claimed invention. Claim(s) 21 and 22 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Gussone et al. (2010). Gussone et al. disclose that dinoflagellates are unicellular algae, which occur abundantly in marine surface waters. Their photosynthetic associates are important primary producers and significantly contribute to the global carboncycle. As part of their vegetative or sexual life cycle, several dinoflagellate species can form cysts, composed of organic material, silicate or calcium carbonate. The calcium carbonate secreting dinoflagellates, the so-called calcareous dinoflagellates, provide an archive for past environmental changes, and also contribute to the global Ca-cycle. Within the last few years the calcareous dinoflagellate species Thoracosphaera heimii, received increasing interest as paleoceanographic proxy archive. Its cysts form throughout the year at a stable position within the water column, particularly at the deep chlorophyll maximum depth and they are highly resistant to dissolution. The individual cysts are small, with a mean individual weight of about 1 ng, but it is comparatively easy to isolate them from marine sediment samples by a combined sieving and density separation technique. Thoracosphaera heimii cysts are very small (10 μm–20 μm) and their size is not known to vary with temperature with cyst wall thicknesses of 0.8–1 μm, the total weight of cysts can be used as a qualitative estimate for the final cyst yield. As the specification defines calcispheres as hollow, typically spherical, calcareous exoskeleton structures from calcareous Dinoflagellate microalgae. In one embodiment, the calcisphere wall comprises calcite elements with their c-axes tangential to the wall. In one embodiment, the calcisphere wall comprises calcite elements with their c-axes perpendicular to the wall. Typically, calcispheres present a mean diameter from 5 to 50 pm. The cysts of the cited references is deemed to fall within the definition. The recitation of “cosmetic, personal care, pharmaceutical or nutraceutical” in the preamble is not limiting because the body of the claim describes a complete invention and the language recited solely in the preamble does not provide any distinct definition of any of the claimed invention’s limitations. Thus, the preamble of the claim(s) is not considered a limitation and is of no significance to claim construction. See Pitney Bowes, Inc. v. Hewlett-Packard Co., 182 F.3d 1298, 1305, 51 USPQ2d 1161, 1165 (Fed. Cir. 1999). See MPEP § 2111.02. Particularly, since claim 22 states that the composition could comprise 100% calcispheres. And as stated previously, a recitation of the intended use of the claimed invention must result in a structural difference between the claimed invention and the prior art in order to patentably distinguish the claimed invention from the prior art. If the prior art structure is capable of performing the intended use, then it meets the claim. Thus the cited reference is deemed to disclose a composition comprising Thoracosphaera heimii calcispheres as broadly claimed. Conclusion No claims are allowed. The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. Any inquiry concerning this communication or earlier communications from the examiner should be directed to RUSSELL G FIEBIG whose telephone number is (571)270-5366. The examiner can normally be reached M-F 8-4. Examiner interviews are available via telephone, in-person, and video conferencing using a USPTO supplied web-based collaboration tool. To schedule an interview, applicant is encouraged to use the USPTO Automated Interview Request (AIR) at http://www.uspto.gov/interviewpractice. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Anand Desai can be reached at 5712720947. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of published or unpublished applications may be obtained from Patent Center. Unpublished application information in Patent Center is available to registered users. To file and manage patent submissions in Patent Center, visit: https://patentcenter.uspto.gov. Visit https://www.uspto.gov/patents/apply/patent-center for more information about Patent Center and https://www.uspto.gov/patents/docx for information about filing in DOCX format. For additional questions, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /RUSSELL G FIEBIG/Examiner, Art Unit 1655
Read full office action

Prosecution Timeline

Jul 17, 2023
Application Filed
Mar 06, 2026
Non-Final Rejection — §101, §102 (current)

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Prosecution Projections

1-2
Expected OA Rounds
63%
Grant Probability
89%
With Interview (+25.8%)
3y 1m
Median Time to Grant
Low
PTA Risk
Based on 870 resolved cases by this examiner. Grant probability derived from career allow rate.

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