US1828082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Doorcheck
Assignee: Individual
•
Filing: 1930-01-10
•
Granted: 1931-10-20
•
Expires: 1950-01-10
Abstract
No abstract record available.
Inventors
- 👤 William E Stonebridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:01
CPC Classifications
E; E05; E05F; E05F1/00; E05F1/002; E05F1/008; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132; Y; Y10; Y10S; Y10S292/00; Y10S292/04; Y10T; Y10T292/00; Y10T292/03; Y10T292/08; Y10T292/0911; Y10T292/0945; Y10T292/0948; Y10T292/1043; Y10T292/1075; Y10T292/1078
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) | 1934-10-19 | 1935-04-20 | 1935-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-10-19 | 1939-04-20 | 1939-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-10-19 | 1943-04-20 | 1943-10-20 | $7700.00 | Window Closed / Lapsed |