US3551362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microporous sheet and process for its production
Assignee: WR Grace and Co
•
Filing: 1967-12-20
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Granted: 1970-12-29
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Expires: 1987-12-20
Abstract
No abstract record available.
Inventors
- 👤 Erhard K H Decker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:03
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/38; C08J; C08J9/00; C08J9/28; C08L; C08L61/00; C08L61/04; C08L61/06; C08L61/12; C25; C25B; C25B13/00; C25B13/04; C25B13/08; H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/411; H01M50/414; H01M50/44; C08J2201/00; C08J2201/04; C08J2201/05; C08J2201/0504; C08L11/00; C08L11/02; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L27/08; C08L31/00; C08L31/02; C08L31/04; C08L9/00; C08L9/02; C08L9/04; C08L9/06; C08L9/08; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-28 | 1974-06-29 | 1974-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-28 | 1978-06-29 | 1978-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-28 | 1982-06-29 | 1982-12-29 | $7700.00 | Window Closed / Lapsed |