US2736553A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door operator
Assignee: Brown Brockmeyer Co
•
Filing: 1954-12-01
•
Granted: 1956-02-28
•
Expires: 1974-12-01
Abstract
No abstract record available.
Inventors
- 👤 Steffen S Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:38
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/60; E05F15/603; E05F15/665; E05F15/668; E05F15/681; E05F15/684; E05Y; E05Y2201/00; E05Y2201/10; E05Y2201/11; E05Y2600/00; E05Y2600/40; E05Y2800/00; E05Y2900/00; E05Y2900/10; E05Y2900/106
Claims Analysis
Total Claims: 0
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US2542432A
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US2672582A
Cited
US2703235A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-27 | 1959-08-29 | 1960-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-27 | 1963-08-29 | 1964-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-27 | 1967-08-29 | 1968-02-28 | $7700.00 | Window Closed / Lapsed |