US2989657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated structure having polyfluoroethylene on one surface thereof
Assignee: Westinghouse Electric Corp
•
Filing: 1956-07-23
•
Granted: 1961-06-20
•
Expires: 1976-07-23
Abstract
No abstract record available.
Inventors
- 👤 Ronald N Sampson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:33
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/46; H02K3/50; H02K3/51; B; B29; B29C; B29C70/00; B29C70/003; B29K; B29K2309/00; B29K2309/08
Claims Analysis
Total Claims: 0
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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) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |