US2708284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetically damped door closer
Assignee: Schlage Lock Co LLC
•
Filing: 1950-02-01
•
Granted: 1955-05-17
•
Expires: 1970-02-01
Abstract
No abstract record available.
Inventors
- 👤 Robert M Conklin
- 👤 Scharf Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:01
CPC Classifications
E; E05; E05F; E05F3/00; E05F3/16; E05Y; E05Y2201/00; E05Y2201/20; E05Y2201/21; E05Y2201/252; E05Y2201/258; E05Y2201/262; E05Y2201/266; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1903832A
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DE586662C
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US1887284A
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US1918879A
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US2108511A
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US2359656A
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US2312077A
Cited
GB558077A
Cited
US2423985A
Cited
US2435112A
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US2492776A
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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) | 1958-05-16 | 1958-11-15 | 1959-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-16 | 1962-11-15 | 1963-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-16 | 1966-11-15 | 1967-05-17 | $7700.00 | Window Closed / Lapsed |