US1757720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sash-operating apparatus
Assignee: Hitchings & Co
•
Filing: 1928-02-06
•
Granted: 1930-05-06
•
Expires: 1948-02-06
Abstract
No abstract record available.
Inventors
- 👤 Thomas E King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:09
CPC Classifications
E; E05; E05F; E05F11/00; E05F11/02; E05F11/08; E05F11/12; E05F11/14; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19642; Y10T74/1967
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) | 1933-05-05 | 1933-11-04 | 1934-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-05-05 | 1937-11-04 | 1938-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-05-05 | 1941-11-04 | 1942-05-06 | $7700.00 | Window Closed / Lapsed |