Patent US2997735A successfully refreshed from Google Patents.
US2997735A
Expired / Lapsed
US
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Control device for swinging doors
Assignee: ACCURATE PARTITIONS Inc
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Filing: 1958-04-08
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Granted: 1961-08-29
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Expires: 1978-04-08
Abstract
No abstract record available.
Inventors
- 👤 Kotermanski Mitchell
- 👤 Warren K Rutledge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:07
CPC Classifications
E; E05; E05F; E05F1/00; E05F1/08; E05F1/10; E05F1/12; E05F1/1207; E05F1/1223; E05F1/02; E05F1/04; E05F1/06; E05F1/061; E05F1/065; E05Y; E05Y2201/00; E05Y2201/60; E05Y2201/604; E05Y2201/622; E05Y2201/638; E05Y2201/688
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |