US2883225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detent mechanism for double hung sash window
Assignee: Individual
•
Filing: 1953-10-16
•
Granted: 1959-04-21
•
Expires: 1973-10-16
Abstract
No abstract record available.
Inventors
- 👤 Ervin T Akehurst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:04
CPC Classifications
E; E05; E05D; E05D13/00; E05D13/04; E05D13/08; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/148; Y; Y10; Y10S; Y10S292/00; Y10S292/20; Y10T; Y10T292/00; Y10T292/08; Y10T292/0801; Y10T292/0834; Y10T292/0836; Y10T292/0838; Y10T292/0846
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US832731A
Cited
US867911A
Cited
US919311A
Cited
US1339879A
Cited
GB228350A
Cited
US2256905A
Cited
US2575575A
Cited
US2649301A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-20 | 1962-10-20 | 1963-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-20 | 1966-10-20 | 1967-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-20 | 1970-10-20 | 1971-04-21 | $7700.00 | Window Closed / Lapsed |