US3682698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating surface with polymer material
Assignee: Westinghouse Brake English Electric Semi Conductors Ltd
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Filing: 1970-01-09
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Granted: 1972-08-08
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Expires: 1990-01-09
Abstract
Abstract A METHOD FOR APPLYING A COATING OF A POLYIMIDE TO A SURFACE, COMPRISING THE STEPS OF APPLYING A LAYER OF A SOLUTION OF A POLYIMIDE POLYMERIZABLE BY CONDENSATION POLYMERIZATIONL TO SAID SURFACE, AND POLYMERING THE LAYER AT AN ELEVATED TEMPERATURE AND AT A SUPER ATOMOSPHERIC PRESSURE EXERTED BY AN INERT GAS APPLIED DIRECTLY TO SAID LAYER, TO PROVIDE A POYMERIC COATING UNDISTORTED BY THE CHEMICAL CONDENSATION PRODUCTS OF THE CONDENSATION POLYMERIZAION EVAPORATING THEREFROM.
Inventors
- 👤 Peter J Palmer
- 👤 Thomas A Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:34
CPC Classifications
H; H10; H10P; H10P14/00; H10P14/60; H10P14/68; H10P14/683; C; C09; C09D; C09D179/00; C09D179/04; C09D179/08; H10P14/63; H10P14/6326; H10P14/6328; H10P14/6334; H10W; H10W74/00; H10W74/10; H10W74/131; H10P14/6342
Claims Analysis
Total Claims: 0
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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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |