US2958089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door back-check and hold open mechanism
Assignee: Kawneer Co Inc
•
Filing: 1958-06-23
•
Granted: 1960-11-01
•
Expires: 1978-06-23
Abstract
No abstract record available.
Inventors
- 👤 Jack M Roehm
- 👤 Victor W Damm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:53
CPC Classifications
E; E05; E05C; E05C17/00; E05C17/02; E05C17/04; E05C17/12; E05C17/24; Y; Y10; Y10S; Y10S16/00; Y10S16/17; Y10T; Y10T292/00; Y10T292/28; Y10T292/301
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1749905A
Cited
US1821571A
Cited
US2108891A
Cited
US2497830A
Cited
US2905565A
Cited
US2904819A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |