US3361589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treating polyimide surface with basic compounds, and polyimide surface having thin layer of polyamide acid
Assignee: EIDP Inc
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Filing: 1964-11-13
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Granted: 1968-01-02
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Expires: 1984-11-13
Abstract
No abstract record available.
Inventors
- 👤 Lindsey William Bryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:38
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; B; B32; B32B; B32B27/00; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1003; C08J2379/00; C08J2379/04; C08J2379/08; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31721
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
THE PROCESS OF IMPROVING THE SURFACE OF AN ARTICLE OF A POLYIMIDE OF A POLYAMIDE-ACID HAVING THE FORMULA
Claim 2
Dependent Claim
18 words
THE PROCESS OF IMPROVING THE SURFACE OF AN ARTICLE OF A POLYIMIDE OF A POLYAMIDE-ACID HAVING THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-01 | 1971-07-03 | 1972-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-01 | 1975-07-03 | 1976-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-01 | 1979-07-03 | 1980-01-02 | $7700.00 | Window Closed / Lapsed |