US3475355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a battery separator
Assignee: WR Grace and Co
•
Filing: 1966-01-25
•
Granted: 1969-10-28
•
Expires: 1986-01-25
Abstract
No abstract record available.
Inventors
- 👤 Erhard Decker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:48
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/28; H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/411; H01M50/414; H01M50/431; H01M50/434; H01M50/437; H01M50/44; C08J2201/00; C08J2201/04; C08J2201/05; C08J2201/0504; C08J2361/00; C08J2361/04; C08J2361/06; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2376653A
Cited
US2446429A
Cited
US2513274A
Cited
US2629698A
Cited
US2653139A
Cited
US2700694A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |