Patent US1720554A successfully refreshed from Google Patents.
US1720554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Latch for closure operators
Assignee: Individual
•
Filing: 1927-12-09
•
Granted: 1929-07-09
•
Expires: 1947-12-09
Abstract
No abstract record available.
Inventors
- 👤 Orville C Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:34
CPC Classifications
E; E05; E05F; E05F13/00; E05F13/04; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/0908; Y10T292/091; Y10T292/0911; Y10T292/0926; Y10T292/0928; Y10T292/0931; Y10T292/0945
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) | 1932-07-08 | 1933-01-07 | 1933-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-07-08 | 1937-01-07 | 1937-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-07-08 | 1941-01-07 | 1941-07-09 | $7700.00 | Window Closed / Lapsed |