Patent US2423294A successfully refreshed from Google Patents.
US2423294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible waterproof material and its production
Assignee: Individual
•
Filing: 1941-11-12
•
Granted: 1947-07-01
•
Expires: 1961-11-12
Abstract
No abstract record available.
Inventors
- 👤 Edward H Colesworthy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:46
CPC Classifications
B; B32; B32B; B32B38/00; B32B38/0012; B32B38/18; B32B38/1825; D; D21; D21H; D21H27/00; D21H27/30; D21H27/32; D21H27/34; B32B2305/00; B32B2305/10; B32B2305/18; B32B2317/00; B32B2317/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US600676A
Cited
FR322755A
Cited
US1301605A
Cited
US1460949A
Cited
US1753281A
Cited
US1877270A
Cited
US2085473A
Cited
US2021095A
Cited
US1991168A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-30 | 1950-12-30 | 1951-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-30 | 1954-12-30 | 1955-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-30 | 1958-12-30 | 1959-07-01 | $7700.00 | Window Closed / Lapsed |