Patent US3618464A successfully refreshed from Google Patents.
US2376919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Asbestos board
Assignee: Keasbey and Mattison Co
•
Filing: 1941-03-14
•
Granted: 1945-05-29
•
Expires: 1961-03-14
Abstract
No abstract record available.
Inventors
- 👤 Clyde R Hutcheroft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:02
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/06; C04B2111/00; C04B2111/90; C04B2111/92
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1948-05-28 | 1948-11-27 | 1949-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-05-28 | 1952-11-27 | 1953-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-05-28 | 1956-11-27 | 1957-05-29 | $7700.00 | Window Closed / Lapsed |