US2913772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing reinforced sponge
Assignee: Akzona Inc
•
Filing: 1956-08-13
•
Granted: 1959-11-24
•
Expires: 1976-08-13
Abstract
No abstract record available.
Inventors
- 👤 Buchkremer Josef
- 👤 Bolton Heinrich
- 👤 Lutz Peter
- 👤 Wistuba Theo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:34
CPC Classifications
B; B29; B29C; B29C44/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB384668A
Cited
GB415728A
Cited
US2280022A
Cited
US2506249A
Cited
US2512506A
Cited
US2540906A
Cited
US2785440A
Cited
US2727278A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |