US3489637A
Expired / Lapsed
US
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Assignee: Permacel
•
Filing: 1965-04-16
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Granted: 1970-01-13
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Expires: 1985-04-16
Abstract
No abstract record available.
Inventors
- 👤 Robert Gresl
- 👤 George J Philippi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:04
CPC Classifications
B; B29; B29C; B29C69/00; B29C69/005; B29C65/00; B29C65/02; B29C65/18; B29C65/24; B29C65/30; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/47; B29C66/472; B29C66/4722; B29C66/80; B29C66/82; B29C66/824; B29C66/8242; B29C66/83; B29C66/832; B29C66/8322; Y; Y10; Y10T; Y10T156/00; Y10T156/12; Y10T156/1317; Y10T156/1322; Y10T156/1339; Y10T83/00; Y10T83/869; Y10T83/8821; Y10T83/8841; Y10T83/8853
Claims Analysis
Total Claims: 0
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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) | 1973-01-12 | 1973-07-14 | 1974-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-12 | 1977-07-14 | 1978-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-12 | 1981-07-14 | 1982-01-13 | $7700.00 | Window Closed / Lapsed |