US2935761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hold open devices for swinging doors and the like
Assignee: BOMMER SPRING HINGE CO Inc
•
Filing: 1956-02-15
•
Granted: 1960-05-10
•
Expires: 1976-02-15
Abstract
No abstract record available.
Inventors
- 👤 Frohlich Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:24
CPC Classifications
E; E05; E05D; E05D3/00; E05D3/06; E05D3/12; E05D11/00; E05D11/10; E05D11/1028; E05D11/105; E05D3/08; E05F; E05F1/00; E05F1/08; E05F1/10; E05F1/12; E05F1/1207; E05F1/1215; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-10 | 1963-11-09 | 1964-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-10 | 1967-11-09 | 1968-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-10 | 1971-11-09 | 1972-05-10 | $7700.00 | Window Closed / Lapsed |