US3452387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closing device for doors
Assignee: Ajax Hardware Manufacturing Corp
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Filing: 1967-10-09
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Granted: 1969-07-01
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Expires: 1987-10-09
Abstract
No abstract record available.
Inventors
- 👤 Torsti T T Jerila
- 👤 Frank A Holmes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:16
CPC Classifications
F; F25; F25D; F25D23/00; F25D23/02; F25D23/028; E; E05; E05D; E05D11/00; E05D11/10; E05D11/1028; E05D11/105; E05D11/1064; E05F; E05F1/00; E05F1/08; E05F1/10; E05F1/12; E05F1/1246; E05F1/1253; E05Y; E05Y2900/00; E05Y2900/30; E05Y2900/31; F25D2323/00; F25D2323/02; F25D2323/024
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2064809A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |