US2925895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire latch for elevator doors
Assignee: COMPREHENSIVE MANUFACTURING SERVICES LLC
•
Filing: 1957-12-16
•
Granted: 1960-02-23
•
Expires: 1977-12-16
Abstract
No abstract record available.
Inventors
- 👤 William C Heisler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:49
CPC Classifications
B; B66; B66B; B66B5/00; B66B5/02; B66B5/021; B66B5/024
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US728135A
Cited
US1007043A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-22 | 1963-08-24 | 1964-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-22 | 1967-08-24 | 1968-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-22 | 1971-08-24 | 1972-02-23 | $7700.00 | Window Closed / Lapsed |