Patent US3684646A successfully refreshed from Google Patents.
US3684646A
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Laminar structures of polyimides
Assignee: EIDP Inc
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Filing: 1969-11-12
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Granted: 1972-08-15
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Expires: 1989-11-12
Abstract
Abstract A LAMINAR ARTICLE IS PROVIDED OF A LAYER OF A POLYMIDE AND A LAYER OF A FLUORINATED POLYMER, EWHICH STRUCTURE IS SUITABLE IN THE FORM OF NARROW TAPES FOR ELECTRICAL INSULATION USES.
Inventors
- 👤 John Anthony Kreuz
- 👤 Don Albert Roper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:16
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/28; B32B27/281; B32B27/32; B32B27/322; H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/303; H01B3/306; H01B3/44; H01B3/443; H01B3/445; B32B2307/00; B32B2307/20; B32B2307/206; B32B2327/00; B32B2327/12; B32B2327/18; B32B2379/00; B32B2379/08; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/31504; Y10T428/3154; Y10T428/31721
Claims Analysis
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References Cited (Backward Citations)
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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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |