Patent US5238975A successfully refreshed from Google Patents.
US5238975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave radiation absorbing adhesive
Assignee: 3M Co
•
Filing: 1992-12-14
•
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 13:40
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.
References Cited (Backward Citations)
US3007160A
Cited
US3240621A
Cited
US3526896A
Cited
US3938152A
Cited
US3806928A
Cited
US4024318A
Cited
US4173018A
Cited
US3866009A
Cited
US3742176A
Cited
US3865627A
Cited
US3843593A
Cited
US3951904A
Cited
US4003840A
Cited
US4034375A
Cited
US4046983A
Cited
US4116906A
Cited
US4226909A
Cited
US4408255A
Cited
US4664971A
Cited
US4414339A
Cited
US4538151A
Cited
JPS59110199A
Cited
US4624798A
Cited
US4624865A
Cited
US4690778A
Cited
US4606848A
Cited
US4822673A
Cited
US4618525A
Cited
US4626642A
Cited
US4752525A
Cited
US4785148A
Cited
JPS62248247A
Cited
US4962000A
Cited
US4906497A
Cited
US4814546A
Cited
US4929574A
Cited
US4952448A
Cited
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 |