US1821879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Latch
Assignee: A S CAMPBELL Co
•
Filing: 1927-03-04
•
Granted: 1931-09-01
•
Expires: 1947-03-04
Abstract
No abstract record available.
Inventors
- 👤 Calpin Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:09
CPC Classifications
E; E05; E05B; E05B85/00; E05B85/20; E05B85/24; E05B85/28; Y; Y10; Y10S; Y10S292/00; Y10S292/23; Y10T; Y10T292/00; Y10T292/08; Y10T292/0863; Y10T292/0886; Y10T292/0887; Y10T292/0889; Y10T292/306; Y10T292/307; Y10T292/308; Y10T292/68; Y10T292/696; Y10T292/702
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) | 1934-08-31 | 1935-03-02 | 1935-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-08-31 | 1939-03-02 | 1939-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-08-31 | 1943-03-02 | 1943-09-01 | $7700.00 | Window Closed / Lapsed |