US1264166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic closing device for fire-doors.
Assignee: ALBERT G ELVIN
•
Filing: 1914-10-26
•
Granted: 1918-04-30
•
Expires: 1934-10-26
Abstract
No abstract record available.
Inventors
- 👤 Frederick W Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:23
CPC Classifications
F; F15; F15B; F15B21/00; F15B21/02
Claims Analysis
Total Claims: 0
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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) | 1921-04-29 | 1921-10-29 | 1922-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1925-04-29 | 1925-10-29 | 1926-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1929-04-29 | 1929-10-29 | 1930-04-30 | $7700.00 | Window Closed / Lapsed |