Prosecution Insights
Last updated: April 19, 2026
Application No. 18/279,541

MAGNETIC SUSPENSION DEVICE

Non-Final OA §102§103
Filed
Aug 30, 2023
Examiner
SCHWARCK, DANIEL ROBERT
Art Unit
2838
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Sri LLC
OA Round
1 (Non-Final)
100%
Grant Probability
Favorable
1-2
OA Rounds
2y 6m
To Grant
0%
With Interview

Examiner Intelligence

Grants 100% — above average
100%
Career Allow Rate
1 granted / 1 resolved
+32.0% vs TC avg
Minimal -100% lift
Without
With
+-100.0%
Interview Lift
resolved cases with interview
Typical timeline
2y 6m
Avg Prosecution
1 currently pending
Career history
2
Total Applications
across all art units

Statute-Specific Performance

§103
33.3%
-6.7% vs TC avg
§102
33.3%
-6.7% vs TC avg
§112
33.3%
-6.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1 resolved cases

Office Action

§102 §103
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 August 30, 2023 is in compliance with the provisions of 37 CFR 1.97. Accordingly, the information disclosure statement is being considered by the examiner. Drawings The drawings received on August 30, 2023 are acceptable. Claim Objections Claim 8 is objected to because of the following informalities: i. Appropriate correction is required. 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 1-5, 7, 9 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Ren et al. (CN 103985310 A). Note: citations are made using the English machine translations of documents. Regarding claim 1, Ren et al. teaches a magnetic suspension device, including: a base (5, 12 in Fig. 1), including at least two first magnetic action units arranged in interval and corresponding to each other (3, 14 in Fig. 1); and a suspension member (7 in Fig. 1), including at least two second magnetic action units (15, 16 in Fig. 1), the at least two second magnetic action units magnetically interact with the at least two first magnetic action units so that the suspension member is suspended between the at least two first magnetic units (Fig. 1; [0012], [0016]). Regarding claim 2, Ren et al. teaches wherein the base includes a base member (12 in Fig. 1) and a frame member (5 in Fig. 1) which is connected to the base member and extends away from the base member (Fig. 1), and the at least two first magnetic action units are respectively disposed on the base member and the frame member (14, 3 in Fig. 1, respectively). Regarding claim 3, Ren et al. teaches wherein the at least two first magnetic action units and the at least two second magnetic action units define an axis passing through a center of the suspension member. (Examiner’s note: the axis can be seen below in Image 1. As can be seen in this image, the magnetic action units are arranged in such a way that an axis passing through the center of the suspension member can be defined.) Regarding claim 4. Ren et al. teaches wherein the suspension member is spherical or non-spherical, or regular or irregular shape (7 in Fig. 1). Regarding claim 5, Ren et al. teaches wherein the at least two first magnetic action units include at least one first upper magnetic action portion (3 in Fig. 1) and at least one first lower magnetic action portion (14 in Fig. 1) arranged in interval and corresponding to each other, the at least two second magnetic action units include at least one second upper magnetic action portion (16 in Fig. 1) and at least one second lower magnetic action portion (15 in Fig. 1), the at least one first upper magnetic action portion and the at least one second upper magnetic action portion attract ([0016]: the upper magnet of the model (16) and the upper magnet of the base/frame (3) have unlike magnetic poles; that is, they attract. The magnetic poles can be seen in Fig. 1), and the at least one first lower magnetic action portion and the at least one second lower magnetic action portion repel or attract ([0016]: the lower magnet of the model (15) and the lower magnet of the base/frame (14) have like magnetic poles; that is, they repel. The magnetic poles can be seen in Fig. 1). Regarding claim 7, Ren et al. teaches wherein the at least one first upper magnetic action portion (3 in Fig. 1) and the at least one second upper magnetic action portion (16 in Fig. 1) are arranged in interval. (Examiner’s note: the examiner is interpreting the phrase “arranged in interval” to mean that the two magnetic action portions are separate pieces arranged in such a way that they share the primary axis shown below in Image 1.) Regarding claim 9, Ren et al. teaches wherein a distance between the at least two first magnetic action units is adjustable ([0012]: “the coil can provide subtle change of magnetic field, maintaining the suspension state of the earth model.” The control chip (9 in Fig. 1) and coil of the electromagnet (14 in Fig. 1) enables adjustment of the model suspension state. As seen in Fig. 1, if the magnetic field of the electromagnet (14 in Fig. 1) is either strengthened or weakened, there will be a corresponding change in the distance between the first magnetic action units (3, 14 in Fig. 1) PNG media_image1.png 427 410 media_image1.png Greyscale Image 1 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. Claim 6 is rejected under 35 U.S.C. 103 as being unpatentable over Ren et al. (CN 103985310 A) in view of Marechal et al. (US 2012/0112589 A1). Note: citations are made using the English machine translations of documents. Regarding claim 6, Ren et al. discloses the invention from above, but does not explicitly teach wherein one of the at least one first upper magnetic action portion and the at least one second upper magnetic action portion includes an arcuate face or tip, and the at least one first upper magnetic action portion and the at least one second upper magnetic action portion are substantially in point contact via the arcuate face or tip. Marechal et al. discloses wherein one of the at least one first upper magnetic action portion and the at least one second upper magnetic action portion includes an arcuate face or tip, and the at least one first upper magnetic action portion and the at least one second upper magnetic action portion are substantially in point contact via the arcuate face or tip (2 in Figs. 1-3, [0095]-[0096]; the tip of the component is magnetic and has an arcuate shape. The pole piece 4 represents the first upper magnetic action portion, with the magnetic tip 2 representing the second upper magnetic action portion. The two pieces remain in contact with each other, creating a pivot point.) It 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 to use the magnetic tip disclosed by Marechal et al. with the magnetic suspension device disclosed by Ren et al. in order to reduce rotational friction between the two magnetic action portions, allowing for easier movement. Claim 8 is rejected under 35 U.S.C. 103 as being unpatentable over Ren et al. (CN 103985310 A) in view of Forshpan (US 2008/0060128 A1), in further view of Smoot et al. (US 2011/0074237 A1). Note: citations are made using the English machine translations of documents. Regarding claim 8, Ren et al. discloses wherein the base includes a base member (12 in Fig. 1) and a frame member (5 in Fig. 1) which is connected to the base member and extends away from the base member (Fig. 1), and the at least two first magnetic action units are respectively disposed on the base member and the frame member (14, 3 in Fig. 1 respectively); the at least one first upper magnetic action portion includes at least one permanent magnet (3 in Fig. 1, [0016]), the at least one second upper magnetic action portion includes at least one permanent magnet (16 in Fig. 1, [0016]), the at least one first lower magnetic action portion is disposed on the base member, the at least one first lower magnetic action portion includes at least one electromagnet (14 in Fig. 1, [0005], [0016]; the lower magnet 14 is wrapped in a coil that receives an electric current controlled by a control chip) and the at least one second lower magnetic action portion includes at least one permanent magnet (15 in Fig. 1, [0015]-[0016]); the frame member is detachably assembled with the base member (11 in Fig. 1, [0018]; Examiner’s note: based on Fig. 1, it is implicit that the base and frame are detachably assembled); the at least two first magnetic action units and the at least two second magnetic action units define an axis passing through a center of the suspension member. (Examiner’s note: the axis can be seen above in Image 1. As can be seen in this image, the magnetic action units are arranged in such a way that an axis passing through the center of the suspension member can be defined); and the suspension member is spherical or non-spherical, or regular or irregular shape (7 in Fig. 1). Ren et al. does not explicitly disclose wherein the frame member has an adjustable length. Forshpan discloses wherein the frame member has an adjustable length (23 in Fig. 1, [0018]: “The length of tubular shafts 23 and the angle between them and base member 12 may vary, such that the height and position of support member 16 may be adjustable.”) It 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 to use the adjustable frame member disclosed by Forshpan with the magnetic suspension device disclosed by Ren et al. in order to accommodate varying sizes of suspension members. Ren et al. and Forshpan disclose the combined invention from above, but do not explicitly disclose the base member further including at least one magnetism sensing member, and the at least one magnetism sensing member is connected to and coils of the at least one electromagnet. Smoot et al. discloses the base member including at least one magnetism sensing member (124 in Fig. 1, [0025]), and the at least one magnetism sensing member is connected to and coils of the at least one electromagnet (236, Fig. 2, [0025]: “a Hall effect sensor may be provided as sensor 124 and provide a feedback signal via a line in arm 116 to a controller or actuator of the electromagnet 120.” The magnetism sensing member (Hall effect sensor) is connected to the electromagnet coils via the driver/actuator). It 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 to use the magnetism sensing member disclosed by Smoot et al. with the magnetic suspension device disclosed by Ren et al. and Forshpan in order to change sense and adjust the magnetic field of the electromagnet, enabling increased stabilization of the suspension member. Claim 10 is rejected under 35 U.S.C. 103 as being unpatentable over Ren et al. (CN 103985310 A) in view of French (US 6275127 B1). Note: citations are made using the English machine translations of documents. Regarding claim 10, Ren et al. discloses the invention from above, but does not explicitly teach wherein the suspension member further includes at least one electronic component, and the at least one electronic component is capable of providing at least one of electrical signal, optical signal, audio signal or/and vibration signal. French discloses wherein the suspension member further includes at least one electronic component (60 in Fig. 7, para. (20) of Description: “A solar battery 14 when illuminated by light L supplies power by means of wires, not shown, to an electronics package 60 which generates appropriate electrical signals to power toroidal coil of wire 48 by means of wires not shown), and the at least one electronic component is capable of providing at least one of electrical signal, optical signal, audio signal or/and vibration signal (para. 20 of Description, as stated above). It 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 to use the electronic component and suspension member disclosed by French with the magnetic suspension device disclosed by Ren et al. in order to provide a signal to the suspension member for charging an internal light source, for the purpose of more clear viewing. Conclusion The prior art made of record and not relied upon is considered pertinent to applicant’s disclosure. Please see attached PTO-892. Kazadi et al. (US 8149079 B2) teaches A levitating mount apparatus is provided which utilizes a permanent magnetic male and female levitation support as described in U.S. Pat. No. 7,501,922. The mount has two general forms. In one general class, the mount is attached to an axle aligned with the axis of symmetry of the female part of the permanent magnetic male and female levitation support. In the second class, the female part of the permanent magnetic male and female levitations support is attached to the bottom of the mount, and no axle is utilized. The mount is stabilized using a stationary support structure which has limited contact with the levitating portion of the apparatus at the top of the mount. Contact Information Any inquiry concerning this communication or earlier communications from the examiner should be directed to DANIEL ROBERT SCHWARCK whose telephone number is (571)272-0289. The examiner can normally be reached Mon-Fri 8:00-5:00 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, Monica Lewis can be reached at 571-272-1838. 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. /FRED E FINCH III/Primary Examiner, Art Unit 2838 /DANIEL R SCHWARCK/Examiner, Art Unit 2838
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Prosecution Timeline

Aug 30, 2023
Application Filed
Jul 26, 2025
Non-Final Rejection — §102, §103 (current)

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Study what changed to get past this examiner. Based on 3 most recent grants.

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Prosecution Projections

1-2
Expected OA Rounds
100%
Grant Probability
0%
With Interview (-100.0%)
2y 6m
Median Time to Grant
Low
PTA Risk
Based on 1 resolved cases by this examiner. Grant probability derived from career allow rate.

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