Prosecution Insights
Last updated: April 19, 2026
Application No. 18/857,980

RECONFIGURABLE INTELLIGENT SURFACES AND METHODS

Non-Final OA §103§112
Filed
Oct 18, 2024
Examiner
LOTTER, DAVID E
Art Unit
2845
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Drexel University
OA Round
1 (Non-Final)
84%
Grant Probability
Favorable
1-2
OA Rounds
2y 3m
To Grant
94%
With Interview

Examiner Intelligence

Grants 84% — above average
84%
Career Allow Rate
493 granted / 584 resolved
+16.4% vs TC avg
Moderate +9% lift
Without
With
+9.4%
Interview Lift
resolved cases with interview
Typical timeline
2y 3m
Avg Prosecution
21 currently pending
Career history
605
Total Applications
across all art units

Statute-Specific Performance

§101
0.3%
-39.7% vs TC avg
§103
49.7%
+9.7% vs TC avg
§102
23.0%
-17.0% vs TC avg
§112
17.8%
-22.2% vs TC avg
Black line = Tech Center average estimate • Based on career data from 584 resolved cases

Office Action

§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 . Priority Receipt is acknowledged of certified copies of papers required by 37 CFR 1.55. 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. Claim 19 is 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 19 is rejected under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), second paragraph, as being indefinite in that it fails to point out what is included or excluded by the claim language. This claim is an omnibus type claim. Claim 19 recites in part “an intelligent system, the intelligent system comprising a RIS as described herein”. The recitation “as described herein” is indefinite because it is not clear what the claim includes as “as described herein”. This language renders claim 19 indefinite because one of ordinary skill in the art is not reasonably apprised of the scope of the claim. 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. Claims 1-3, 6-9, and 11-12 are rejected under 35 U.S.C. 103 as being unpatentable over Arun et al., (US 2020/0350693), hereinafter Arun in view of Jost et al., (US 2016/0165970), hereinafter Jost. Regarding claim 1 Arun discloses a reconfigurable intelligent surface (RIS) for controlling propagation in a communication system (e.g., Fig. 1B, at 104), the RIS comprising: a plurality of switches (e.g., Fig. 5, at 402); a first plurality of conductive fabrics (e.g., Fig. 1B, at 118; paragraph 0027), wherein each one of the first plurality of conductive fabrics is connected to another one of the first plurality of conductive fabrics by a switch of the plurality of switches (e.g., paragraph 0053); a second plurality of conductive fabrics (e.g., Fig. 5, at 118; paragraph 0027), wherein each one of the second plurality of conductive fabrics is connected to another of the second plurality of conductive fabrics by one switch of the plurality of switches (e.g., paragraph 0053); a non-conductive layer (e.g., paragraph 0029) wherein the first plurality of conductive fabrics and the second plurality of conductive fabrics are attached to the non-conductive layer, the first plurality of conductive fabrics being spaced from the second plurality of conductive fabrics (e.g., paragraph 0029). Arun does not explicitly disclose wherein the non-conductive layer is fabric. Jost discloses wherein the non-conductive layer is fabric (e.g., paragraphs 0066 and 0079). It would have been obvious to one of ordinary skill in the art before the effective filing date of the invention to modify the reconfigurable intelligent surface (RIS) for controlling propagation in a communication system disclosed by Arun in accordance with the teaching of Jost regarding using a non-conductive fabric layer in order to allow for providing the whole electronic element inside a textile unit (Jost, paragraph 0066). PNG media_image1.png 1024 1128 media_image1.png Greyscale Regarding claim 3 Arun further discloses the RIS of claim 1, wherein each of the plurality of switches is wirelessly controlled by the communication system (paragraph 0059). Regarding claim 6 Arun does not disclose the RIS of claim 1, wherein both of the first plurality of conductive fabrics and the second plurality of conductive fabrics are knitted to the non-conductive fabric layer. Jost discloses wherein both of the first plurality of conductive fabrics and the second plurality of conductive fabrics are knitted to the non-conductive fabric layer (e.g., paragraph 0066). It would have been obvious to one of ordinary skill in the art before the effective filing date of the invention to modify the reconfigurable intelligent surface (RIS) for controlling propagation in a communication system disclosed by Arun in accordance with the teaching of Jost regarding using a non-conductive fabric layer in order to allow for providing the whole electronic element inside a textile unit (Jost, paragraph 0066). Regarding claim 7 Arun does not disclose the RIS of claim 1, wherein both of the first plurality of conductive fabrics and the second plurality of conductive fabrics comprise knitted conductive fabrics. Jost discloses wherein both of the first plurality of conductive fabrics and the second plurality of conductive fabrics comprise knitted conductive fabrics (e.g., paragraph 0066). It would have been obvious to one of ordinary skill in the art before the effective filing date of the invention to modify the reconfigurable intelligent surface (RIS) for controlling propagation in a communication system disclosed by Arun in accordance with the teaching of Jost regarding using a non-conductive fabric layer in order to allow for providing the whole electronic element inside a textile unit (Jost, paragraph 0066). Regarding claim 8 Arun discloses a communication system comprising: a reconfigurable intelligent surface (RIS) comprising (e.g., Fig. 1B, at 104): a plurality of switches (e.g. paragraph 0053), a first plurality of conductive fabrics (e.g., Fig. 1B, at 118; paragraph 0027), wherein each one of the first plurality of conductive fabrics is connected to another one of the first plurality of conductive fabrics by one switch of the plurality of switches (e.g., paragraph 0053), a second plurality of conductive fabrics (e.g., Fig. 5, at 118; paragraph 0027), wherein each one of the second plurality of conductive fabrics is connected to another one of the second plurality of conductive fabrics by one switch of the plurality of switches (e.g., paragraph 0053), and a non-conductive layer (e.g. paragraph 0007), wherein the first plurality of conductive fabrics and the second plurality of conductive fabrics are attached to the non-conductive layer (e.g., paragraph 0029), the first plurality of conductive fabrics being spaced from the second plurality of conductive fabric (e.g., paragraph 0029); and a controller (Fig. 1B, at 116) configured to transmit control signals to the plurality of switches to control propagation (paragraphs 0058-0059). Arun does not explicitly disclose wherein the non-conductive layer is fabric. Jost discloses wherein the non-conductive layer is fabric (e.g., paragraphs 0066 and 0079). It would have been obvious to one of ordinary skill in the art before the effective filing date of the invention to modify the reconfigurable intelligent surface (RIS) for controlling propagation in a communication system disclosed by Arun in accordance with the teaching of Jost regarding using a non-conductive fabric layer in order to allow for providing the whole electronic element inside a textile unit (Jost, paragraph 0066). Regarding claim 9 Arun does not disclose the communication system of claim 8, wherein both of the first plurality of conductive fabrics and the second plurality of conductive fabrics are knitted to the non-conductive fabric layer. Jost discloses wherein both of the first plurality of conductive fabrics and the second plurality of conductive fabrics are knitted to the non-conductive fabric layer (e.g., paragraph 0066). It would have been obvious to one of ordinary skill in the art before the effective filing date of the invention to modify the reconfigurable intelligent surface (RIS) for controlling propagation in a communication system disclosed by Arun in accordance with the teaching of Jost regarding using a non-conductive fabric layer in order to allow for providing the whole electronic element inside a textile unit (Jost, paragraph 0066). Regarding claim 11 Arun further discloses the communication system of claim 8, further comprising: a transmitter (e.g., Fig. 1A, at 106 to 102 thru 104; paragraph 0023) configured to transmit a signal; and a receiver (e.g., Fig. 1A, at 102) configured to receive the signal via the RIS. Regarding claim 12 the communication system of claim 8, wherein the RIS is integrated into at least one of a drape, a wall covering, an upholstery, and a carpet (e.g., paragraph 0007; see also paragraph 0028). Claim 10 is rejected under 35 U.S.C. 103 as being unpatentable over Arun in view of Jost as applied to claim 8 above, and further in view of Angstrom et al., (WO 2021/239259), hereinafter Angstrom. Regarding claim 10 Arun as modified by Jost does not disclose the communication system of claim 8, wherein the controller transmits the control signals to the plurality of switches to affect an impedance of the RIS. Angstrom discloses wherein the controller transmits the control signals to the plurality of switches to affect an impedance of the RIS. It would have been obvious to one of ordinary skill in the art before the effective filing date of the invention to modify the reconfigurable intelligent surface (RIS) for controlling propagation in a communication system disclosed by Arun as modified by Jost in accordance with the teaching of Angstrom regarding a controller to affect an impedance of an RIS in order to allow for reconfiguration of the RIS the optimizing the transmitter and receiver setup (Angstrom, page 13, lines 10-15). Claims 13-19 are rejected under 35 U.S.C. 103 as being unpatentable over Arun in view of Jost as applied to claim 8 above, and further in view of Naderi et al., (US 2023/0198313), hereinafter Naderi. Regarding claim 13 Arun as modified by Jost does not disclose an intelligent system, comprising: a reconfigurable intelligent surface (RIS), the RIS comprising at least one energy harvesting circuit. Naderi discloses a reconfigurable intelligent surface (RIS), the RIS comprising at least one energy harvesting circuit (e.g., paragraph 0038). It would have been obvious to one of ordinary skill in the art before the effective filing date of the invention to modify the reconfigurable intelligent surface (RIS) for controlling propagation in a communication system disclosed by Arun as modified by Jost in accordance with the teaching of Naderi regarding using an energy harvesting circuit in order to properly power the RIS (Naderi, paragraph 0038). Regarding claim 14 Arun as modified by Jost does not disclose the intelligent system of claim 13, wherein the energy harvesting circuit comprises a rectifier. Naderi discloses wherein the energy harvesting circuit comprises a rectifier (e.g., paragraph 0038). It would have been obvious to one of ordinary skill in the art before the effective filing date of the invention to modify the reconfigurable intelligent surface (RIS) for controlling propagation in a communication system disclosed by Arun as modified by Jost in accordance with the teaching of Naderi regarding using a rectifier as an energy harvesting circuit in order to properly power the RIS (Naderi, paragraph 0038). Regarding claim 15 Arun as modified by Jost does not disclose the intelligent system of claim 14, wherein the rectifier operates according to any one or more of (i) direct rectification, (ii) rectification with DC bias, and (iii) rectification with a radio frequency (RF) amplifier. Naderi discloses wherein the rectifier operates according to any one or more of (i) direct rectification (e.g., paragraphs 0010 and 0038), (ii) rectification with DC bias (e.g., paragraphs 0010 and 0038), and (iii) rectification with a radio frequency (RF) amplifier (e.g., paragraphs 0010 and 0038). It would have been obvious to one of ordinary skill in the art before the effective filing date of the invention to modify the reconfigurable intelligent surface (RIS) for controlling propagation in a communication system disclosed by Arun as modified by Jost in accordance with the teaching of Naderi regarding using a rectifier as an energy harvesting circuit in order to amplify the RIS power (Naderi, paragraph 0038). Regarding claim 16 Arun as modified by Jost does not disclose the intelligent system of claim 13 wherein the energy harvesting circuit comprises a rectenna. Naderi discloses the intelligent system of claim 13 wherein the energy harvesting circuit comprises a rectenna (e.g., paragraphs 0010 and 0038). It would have been obvious to one of ordinary skill in the art before the effective filing date of the invention to modify the reconfigurable intelligent surface (RIS) for controlling propagation in a communication system disclosed by Arun as modified by Jost in accordance with the teaching of Naderi regarding using a rectifier as an energy harvesting circuit in order to optimize RIS performance (Naderi, paragraph 0038). Regarding claim 17 Arun as modified by Jost does not disclose the intelligent system of claim 16, wherein the rectenna comprises a unit cell of the RIS and a RF-direct current (DC) conversion circuit. Naderi discloses wherein the rectenna comprises a unit cell of the RIS and a RF-direct current (DC) conversion circuit (e.g., paragraphs 0010 and 0038). It would have been obvious to one of ordinary skill in the art before the effective filing date of the invention to modify the reconfigurable intelligent surface (RIS) for controlling propagation in a communication system disclosed by Arun as modified by Jost in accordance with the teaching of Naderi regarding using a rectifier as an energy harvesting circuit in order to optimize RIS performance (Naderi, paragraph 0038). Regarding claim 18 Arun as modified by Jost does not disclose the intelligent system of claim 16, further comprising a DC bias and/or DC insertion associated with the rectifier. Naderi discloses wherein the rectenna comprises a unit cell of the RIS and a RF-direct current (DC) conversion circuit (e.g., paragraphs 0010 and 0038). It would have been obvious to one of ordinary skill in the art before the effective filing date of the invention to modify the reconfigurable intelligent surface (RIS) for controlling propagation in a communication system disclosed by Arun as modified by Jost in accordance with the teaching of Naderi regarding using a rectifier as an energy harvesting circuit in order to optimize RIS performance (Naderi, paragraph 0038). Regarding claim 19 Arun as best understood discloses an intelligent system, the intelligent system comprising a RIS as described herein (e.g., Title, Abstract, see also mapping of claim 13). Allowable Subject Matter Claims 2, 4-5, and 20-21 are objected to as being dependent upon a rejected base claim, but would be allowable if rewritten in independent form including all of the limitations of the base claim and any intervening claims. The following is a statement of reasons for the indication of allowable subject matter: Regarding dependent claim 2, patentability exists, at least in part, with the claimed features of wherein each of the first plurality of conductive fabrics includes a knitted pocket, each knitted pocket including one of the plurality of switches attached thereto. Arun and Jost are all cited as teaching some elements of the claimed invention including a reconfigurable intelligent surface having a plurality of switches, a first plurality of conductive fabrics, a second plurality of conductive fabrics, and a non-conductive layer. However, the prior art, when taken alone, or, in combination, cannot be construed as reasonably teaching or suggesting all of the elements of the claimed invention as arranged, disposed, or provided in the manner as claimed by the Applicant. Regarding dependent claim 4, patentability exists, at least in part, with the claimed features of a control fabric layer that includes a plurality of conductive threads configured to carry control signals to the plurality of switches. Arun and Jost are all cited as teaching some elements of the claimed invention including a reconfigurable intelligent surface having a plurality of switches, a first plurality of conductive fabrics, a second plurality of conductive fabrics, and a non-conductive layer. However, the prior art, when taken alone, or, in combination, cannot be construed as reasonably teaching or suggesting all of the elements of the claimed invention as arranged, disposed, or provided in the manner as claimed by the Applicant. Regarding dependent claim 20, patentability exists, at least in part, with the claimed features of developing a harvested energy map or received power distribution of an intelligent system according claim 1. Arun and Jost are all cited as teaching some elements of the claimed invention including a reconfigurable intelligent surface having a plurality of switches, a first plurality of conductive fabrics, a second plurality of conductive fabrics, and a non-conductive layer. However, the prior art, when taken alone, or, in combination, cannot be construed as reasonably teaching or suggesting all of the elements of the claimed invention as arranged, disposed, or provided in the manner as claimed by the Applicant. Conclusion The Examiner has pointed out particular references contained in the prior art of record within the body of this action for the convenience of the Applicant. Although the specified citations are representative of the teachings in the art and are applied to the specific limitations within the individual claim, other passages and figures may apply. Applicant, in preparing the response, should consider fully the entire reference aspotentially teaching all or part of the claimed invention, as well as the context of thepassage as taught by the prior art or disclosed by the Examiner. Any inquiry concerning this communication or earlier communications from the examiner should be directed to DAVID E LOTTER whose telephone number is (571)270-7422. The examiner can normally be reached M-F 10am-6pm. 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, Dameon Levi can be reached at 571-272-2105. 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. DAVID E. LOTTER Primary Examiner Art Unit 2845 /DAVID E LOTTER/Primary Examiner, Art Unit 2845
Read full office action

Prosecution Timeline

Oct 18, 2024
Application Filed
Jan 24, 2026
Non-Final Rejection — §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
84%
Grant Probability
94%
With Interview (+9.4%)
2y 3m
Median Time to Grant
Low
PTA Risk
Based on 584 resolved cases by this examiner. Grant probability derived from career allow rate.

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