US5238975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave radiation absorbing adhesive
Assignee: 3M Co
•
Filing: 1992-12-14
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Granted: 1993-08-24
•
Expires: 2012-12-14
Abstract
Abstract A microwave radiation absorbing adhesive comprises dissipative particles bound in a thermoplastic or thermosetting adhesive The absorbing adhesive may be applied directly to the surface of any object, or to an irregularly shaped object, or into cracks or crevices in or between objects, including conventional absorbers. Several types of dissipative particles and adhesives may be used.
Inventors
- 👤 Eric J. Johnson
- 👤 Charles E. Boyer, III
- 👤 Edmond J. Nielson
- 👤 Chris A. Minick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:27
CPC Classifications
H; H01; H01Q; H01Q17/00; H01Q17/004; C; C09; C09J; C09J201/00; H01Q17/002; C08; C08L; C08L2666/00; C08L2666/54; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2804; Y10T428/2852; Y10T428/2857; Y10T428/287; Y10T428/2878; Y10T428/2891; Y10T428/2896
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
116 words
A non-conductive microwave radiation absorbing adhesive comprising dissipative particles dispersed in a polymeric dielectric material chosen from the group consisting of thermosetting adhesives and thermoplastic adhesives, in which the dissipative particles range in largest dimension from 0.1 to 150 microns, and are chosen from the group consisting of solid microspheres made from a dissipative material, hollow microbubbles made from a dissipative material, solid microspheres coated with a dissipative material, hollow microbubbles coated with a dissipative material, filaments made from a dissipative material, and flakes made from a dissipative material, and in which at least one dissipative material is chosen from the group consisting of tungsten, chromium, aluminum, copper, titanium, titanium nitride, molybdenum disilicide, iron, and nickel.
Claim 2
Dependent Claim
116 words
A non-conductive microwave radiation absorbing adhesive comprising dissipative particles dispersed in a polymeric dielectric material chosen from the group consisting of thermosetting adhesives and thermoplastic adhesives, in which the dissipative particles range in largest dimension from 0.1 to 150 microns, and are chosen from the group consisting of solid microspheres made from a dissipative material, hollow microbubbles made from a dissipative material, solid microspheres coated with a dissipative material, hollow microbubbles coated with a dissipative material, filaments made from a dissipative material, and flakes made from a dissipative material, and in which at least one dissipative material is chosen from the group consisting of tungsten, chromium, aluminum, copper, titanium, titanium nitride, molybdenum disilicide, iron, and nickel.
Claim 3
Dependent Claim
31 words
The absorbing adhesive of claim 1 in which the polymeric dielectric material is chosen from the group consisting of polyamides, polyethylenes, polypropylenes, polymethylmethacrylates, urethanes, cellulose acetates, vinyl acetates, epoxies, and silicones.
Claim 4
Dependent Claim
21 words
The absorbing adhesive of claim 1 in which the volume loading of the dissipative particles is between 1 and 60 percent.
Claim 5
Dependent Claim
21 words
The absorbing adhesive of claim 3 in which the volume loading of the dissipative particles is between 10 and 50 percent.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-08-23 | 1997-02-22 | 1997-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-23 | 2001-02-22 | 2001-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-23 | 2005-02-22 | 2005-08-24 | $7700.00 | Window Closed / Lapsed |