Prosecution Insights
Last updated: April 19, 2026
Application No. 18/030,325

SUSTAINABLE CURTAIN WALL

Non-Final OA §102§103§112
Filed
Apr 05, 2023
Examiner
EDWARDS, LYDIA E
Art Unit
1796
Tech Center
1700 — Chemical & Materials Engineering
Assignee
The University of North Carolina at Charlotte
OA Round
1 (Non-Final)
60%
Grant Probability
Moderate
1-2
OA Rounds
3y 9m
To Grant
64%
With Interview

Examiner Intelligence

Grants 60% of resolved cases
60%
Career Allow Rate
419 granted / 700 resolved
-5.1% vs TC avg
Minimal +4% lift
Without
With
+4.1%
Interview Lift
resolved cases with interview
Typical timeline
3y 9m
Avg Prosecution
36 currently pending
Career history
736
Total Applications
across all art units

Statute-Specific Performance

§101
0.1%
-39.9% vs TC avg
§103
49.1%
+9.1% vs TC avg
§102
20.6%
-19.4% vs TC avg
§112
22.3%
-17.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 700 resolved cases

Office Action

§102 §103 §112
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 . Information Disclosure Statement The information disclosure statement (IDS) submitted on 04/05/2023 is in compliance with the provisions of 37 CFR 1.97. Accordingly, the information disclosure statement is being considered by the examiner. Election/Restrictions Applicant’s election without traverse of Group I, claim 1-10 in the reply filed on 02/27/2026 is acknowledged. Claims 11-20 are withdrawn from further consideration pursuant to 37 CFR 1.142(b) as being drawn to a nonelected Invention, there being no allowable generic or linking claim. Election was made without traverse in the reply filed on 02/27/2026. Claim Rejections - 35 USC § 112 The following is a quotation of 35 U.S.C. 112(b): (b) CONCLUSION.—The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the inventor or a joint inventor regards as the invention. The following is a quotation of 35 U.S.C. 112 (pre-AIA ), second paragraph: The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the applicant regards as his invention. Claims 1-10 are rejected under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), second paragraph, as being indefinite for failing to particularly point out and distinctly claim the subject matter which the inventor or a joint inventor (or for applications subject to pre-AIA 35 U.S.C. 112, the applicant), regards as the invention. Claim 1 recites the limitations “one or more bioreactors of a microalgae curtain wall” and “the bioreactors” which is not clear if “bioreactors” is referring to the previously claimed “photobioreactors” and if “microalgae curtain wall” is referring to the previous “microalgae curtain wall” or a different microalgae curtain wall. Claim 10 recites the limitation “ the adjoining room” in line 8. There is insufficient antecedent basis for this limitation in the claim. Claims 2-9 are rejected as dependent on a rejected claim. Claim Rejections - 35 USC § 102 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. Claims 1-4 and 6-8 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Melchiorri US 2019/0316067 cited in the IDS filed 04/05/2023. Regarding claim 1, Melchiorri discloses a microalgae system, comprising: a microalgae storage tank adapted to store microalgae cultures (The liquid media (12) comprising a photosynthetic microorganism in a reservoir 71 is conveyed by a pump (72) into a rectangular PBR through the inlet (3). [0182]); a microalgae curtain wall including one or more photobioreactors (photobioreactor 60) adapted to receive the microalgae cultures from the microalgae storage tank and to grow microalgae; and a controller (computers and sensors) configured to determine at least one of a concentration, color (optical clarity), and tint (optical clarity) for microalgae in one or more bioreactors of a microalgae curtain wall based on at least one of a desired heat transmission, solar gain, and daylight transmission of the microalgae curtain wall, and control production of the microalgae within the one or more bioreactors such that the at least one of the concentration, color, and tint for the microalgae within the one or more bioreactors is obtained therein [0152-0156, 0171, 0182 and 0195]. Regarding claim 2, Melchiorri discloses wherein the one or more photobioreactors are arranged in an array including multiple photobioreactor circuits as shown in Figs. 19A and 19B. As to wherein the controller is configured to individually control the at least one of the concentration, color, and tint of the microalgae contained within each of the multiple photobioreactor circuits, the device disclosed by Melchiorri is structurally the same as the instantly claimed. Thus, in the absence of further positively recited structure the device of Melchiorri is capable of providing the claimed operating conditions in view of [0152-0156, 0171, 0182 and 0195]. Regarding claim 3, Melchiorri discloses that sensors can permit the monitoring of the environment inside the chamber of the device, in order to enable control of optical clarity (turbidity) [0156]. Also see [0194 and 0202]. As to wherein the controller is configured to, based on a user controlled selection, reduce a turbidity level of at least one photobioreactor circuit to provide one or more viewing windows for an occupant, the device disclosed by Melchiorri is structurally the same as the instantly claimed. Thus, in the absence of further positively recited structure the device of Melchiorri is capable of providing the claimed operating conditions. Regarding claim 4, Melchiorri discloses sensors can be provided on portions or on any other surface of the chamber (inside or outside the chamber) to monitor conditions such as irradiance levels, temperature, humidity or other environmental conditions. These sensors or similar sensors, if located inside the chambers (room) may be used to detect gas concentration levels, humidity and/or temperature in the chamber [0152]. Melchiorri also discloses that sensors send outputs to the computers which then control operations of the temperature control systems [0182]. As to determining the desired heat transmission is based on internal temperatures of a room adjoining the microalgae curtain wall and exterior temperatures and whether, based on temperature control settings for the room, heat should be retained within the room, heat should be expelled from the room, or heat should be blocked from entering the room, as best as can be understood, it appears that the above claim language relates to how the microalgae system is to be used. The device disclosed by Melchiorri is structurally the same as the instantly claimed. Thus, in the absence of further positively recited structure the device of Melchiorri is capable of providing the claimed operating conditions. Additionally, it is noted that apparatus claims cover what a device is, not what a device does or how it is to be used. A claim containing a recitation with respect to the manner in which a claimed apparatus is intended to be employed does not differentiate the claimed apparatus from a prior art apparatus if the prior art apparatus teaches all the structural limitations of the claim. See MPEP § 2114. Additionally, it is noted that apparatus claims cover what a device is, not what a device does or how it is to be used. A claim containing a recitation with respect to the manner in which a claimed apparatus is intended to be employed does not differentiate the claimed apparatus from a prior art apparatus if the prior art apparatus teaches all the structural limitations of the claim. See MPEP § 2114. Regarding claim 6, Melchiorri discloses controlling production of the microalgae includes controlling how much and how often microalgae cultures are provided to the one or more photobioreactors [0147, 0153-0156 and 0182]. Regarding claim 7, Melchiorri discloses controlling the production of the microalgae also includes controlling an amount of carbon dioxide provided to the one or more photobioreactors [0134, 0153-0156, 0182 and 0195]. Regarding claim 8, Melchiorri discloses the controller is also configured to divert returned microalgae to a heat exchanger and extract heat from the microalgae for at least one of hydronic heating and domestic water heating [0145]. Claim Rejections - 35 USC § 103 The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. The factual inquiries for establishing a background for determining obviousness under 35 U.S.C. 103 are summarized as follows: 1. Determining the scope and contents of the prior art. 2. Ascertaining the differences between the prior art and the claims at issue. 3. Resolving the level of ordinary skill in the pertinent art. 4. Considering objective evidence present in the application indicating obviousness or nonobviousness. Claims 5 and 9 are rejected under 35 U.S.C. 103 as being unpatentable over Melchiorri US 2019/0316067 as applied to claims 1-4 and 6-8 above, and further in view of Legendre et al. (hereinafter Legendre) WO 2013/011240 cited in the IDS filed 04/05/2023. Regarding claim 5, Melchiorri does not expressly disclose wherein the microalgae curtain wall is a biochromic window, and the desired solar gain and daylight transmission of the microalgae is based on settings provided by an occupant in the room. Legendre discloses an integrated curtain wall for the production of microalgae wherein the microalgae curtain wall is a biochromic window. (According to the invention, the module (D) may comprise at least two parallel walls, or preferably substantially parallel walls, defining at least one interior space, one of these walls being able to serve as front wall of the building or to be affixed to a façade wall of a building. According to the invention, at least one interior space of the module (D) may comprise a culture container or a culture medium of algae and/or microorganisms.). See Figs. 5 and 6. Also see [0035 and 0044]. It would have been obvious to one of ordinary skill in the art to modify Melchiorri with a biochromic window as taught by Legendre, since biochromic windows are known to reduce energy consumption, improve air quality and accelerate the growth of microalgae. Thereby, providing a more environmentally conscious photobioreactor device. As to setting the desired solar gain and daylight transmission of the microalgae is based on settings provided by an occupant in the room. The device disclosed by the combination of Melchiorri and Legendre is structurally the same as the instantly claimed. Thus, in the absence of further positively recited structure the device of Melchiorri and Legendre is capable of providing the claimed operating conditions. Additionally, it is noted that apparatus claims cover what a device is, not what a device does or how it is to be used. A claim containing a recitation with respect to the manner in which a claimed apparatus is intended to be employed does not differentiate the claimed apparatus from a prior art apparatus if the prior art apparatus teaches all the structural limitations of the claim. See MPEP § 2114. Regarding claim 9, Melchiorri does not expressly disclose wherein the microalgae curtain wall further includes: an interior glass panel; an exterior glass panel offset from the interior glass panel forming a gap therebetween; and transoms holding the interior glass panel and the exterior glass panel therebetween and suspending the photobioreactors in the gap and between the interior glass panel and the exterior glass panel. Legendre discloses wherein the microalgae curtain wall further includes: an interior glass panel; an exterior glass panel offset from the interior glass panel forming a gap therebetween (According to the invention, the module (D) may comprise at least two parallel walls, or preferably substantially parallel walls, defining at least one interior space, one of these walls being able to serve as front wall of the building or to be affixed to a façade wall of a building. According to the invention, at least one interior space of the module (D) may comprise a culture container or a culture medium of algae and / or microorganisms.); and transoms (venial V) holding the interior glass panel and the exterior glass panel therebetween and suspending the photobioreactors in the gap and between the interior glass panel and the exterior glass panel (The space between the modules (E) and (D) and the windows (N) comprises a passageway allowing the technical passage for maintenance and also defining a buffer space in which the temperature is regulated passively by the opening controlled venials (V). The corridor is an extension of the manufactured concrete slab that is fixed in the primary framework.). See at least Figs. 10-13. Also see [0035, 0044, 0280 and 0284-0285]. Claim 10 is rejected under 35 U.S.C. 103 as being unpatentable over Melchiorri US 2019/0316067 in view of Legendre et al. (hereinafter Legendre) WO 2013/011240 as applied to claims 5 and 9 above, and further in view of Pinel et al. (hereinafter Pinel) CA 2336524. Regarding claim 10, the rejection of claim 9 above is relied upon. Melchiorri does not expressly disclose wherein the curtain wall further includes mullions holding the interior glass panel and the exterior glass panel therebetween and positioned at sides of the photobioreactors, and at least one of the mullions and the transoms anchored to a building structure, wherein each of the transoms and the mullions include glass support brackets for the interior glass panel and the exterior glass panel, forming a seal therewith, and wherein the transoms, the mullions, the interior glass panel, and the exterior glass panel form an insulated glass structure, and wherein the controller is also configured to supply air from the adjoining room into a space within the insulated glass structure surrounding the one or more photobioreactors to increase insulation of the microalgae curtain wall. Legendre discloses wherein the curtain wall further includes mullions (z rail/frame) holding the interior glass panel and the exterior glass panel therebetween and positioned at sides of the photobioreactors as shown in at least Figs. 10-13, and at least one of the mullions and the transoms (venial V) anchored to a building structure (According to the invention, the assembly of the modules (D) and (E) can be, for example, made by fixing said modules on a metal frame (C) directly on the building or on the nose of the floor slabs of the building. for example via stiffeners or needles (F). [0082 and 0244]). It would have been obvious to one of ordinary skill in the art to modify Melchiorri with the teachings of Legendre in order to provide to a more environmentally conscious photobioreactor device that reduces energy consumption, improves air quality and accelerates the growth of microalgae. Melchiorri and Legendre do not expressly disclose using support brackets. Pinel discloses a bioreactor for the treatment of wastewater using ultraviolet radiation with inlets, outlets, and a cylindrical housing. See Abstract. Pinel also discloses the housing to be mounted using mounting brackets discussed on at least page 5, lines 19-20. It would have been obvious to one of ordinary skill to modify Melchiorri and Legendre to include support brackets as taught by Pinel as a means for supporting the algae culture container of Legendre, motivated by a reasonable expectation of success to achieve a predictable result, i.e., an effective way of vertically supporting the photobioreactor. As to wherein each of the transoms and the mullions include glass support brackets for the interior glass panel and the exterior glass panel, forming a seal therewith, and wherein the transoms, the mullions, the interior glass panel, and the exterior glass panel form an insulated glass structure, Legendre discloses that the double facade advantageously makes it possible to form an air mattress around the building and/or to confine heat and/or the freshness emitted by the building [0071] thus, forming an insulated glass structure. Therefore, the combination of Melchiorri, Legendre and Pinel discloses wherein each of the transoms and the mullions include glass support brackets for the interior glass panel and the exterior glass panel, forming a seal therewith, and wherein the transoms, the mullions, the interior glass panel, and the exterior glass panel form an insulated glass structure. Lastly, as to wherein the controller is also configured to supply air from the adjoining room into a space within the insulated glass structure surrounding the one or more photobioreactors to increase insulation of the microalgae curtain wall, the device disclosed by the combination of Melchiorri, Legendre and Pinel is structurally the same as the instantly claimed. Thus, in the absence of further positively recited structure the device of Melchiorri, Legendre and Pinel is capable of providing the claimed operating conditions in view of [0141 and 0182 of Melchiorri; and 0042-0043, 0178-0180 of Legendre]. Additionally, it is noted that apparatus claims cover what a device is, not what a device does or how it is to be used. A claim containing a recitation with respect to the manner in which a claimed apparatus is intended to be employed does not differentiate the claimed apparatus from a prior art apparatus if the prior art apparatus teaches all the structural limitations of the claim. See MPEP § 2114. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to LYDIA EDWARDS whose telephone number is (571)270-3242. The examiner can normally be reached on Monday-Wednesday 08:00-18:00 EST. 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, Curtis Mayes can be reached on 571-272-1234. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of an application may be obtained from the Patent Application Information Retrieval (PAIR) system. Status information for published applications may be obtained from either Private PAIR or Public PAIR. Status information for unpublished applications is available through Private PAIR only. For more information about the PAIR system, see http://pair-direct.uspto.gov. Should you have questions on access to the Private PAIR system, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative or access to the automated information system, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /LYDIA EDWARDS/Primary Examiner, Art Unit 1796
Read full office action

Prosecution Timeline

Apr 05, 2023
Application Filed
Mar 30, 2026
Non-Final Rejection — §102, §103, §112 (current)

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Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

1-2
Expected OA Rounds
60%
Grant Probability
64%
With Interview (+4.1%)
3y 9m
Median Time to Grant
Low
PTA Risk
Based on 700 resolved cases by this examiner. Grant probability derived from career allow rate.

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