US1994428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Window lock and method for making the same
Assignee: Francis Keil & Son Inc
•
Filing: 1931-08-11
•
Granted: 1935-03-12
•
Expires: 1951-08-11
Abstract
No abstract record available.
Inventors
- 👤 Henry F Keil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:10
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/38; E; E05; E05F; E05F11/00; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/148; Y; Y10; Y10S; Y10S16/00; Y10S16/42; Y10T; Y10T29/00; Y10T29/49; Y10T29/49616; Y10T29/49623; Y10T29/49625; Y10T29/49627; Y10T29/49826; Y10T29/4984; Y10T29/49845; Y10T29/49849; Y10T29/49908; Y10T29/49915; Y10T29/49925; Y10T292/00; Y10T292/08; Y10T292/0863; Y10T292/0864; Y10T292/1099
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) | 1938-03-11 | 1938-09-10 | 1939-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-03-11 | 1942-09-10 | 1943-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-03-11 | 1946-09-10 | 1947-03-12 | $7700.00 | Window Closed / Lapsed |