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Patent US2724857A successfully refreshed from Google Patents.
US2724857A
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US
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Control arm and counterbalance for overhead door
Assignee: Stanley Works
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Filing: 1953-07-22
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Granted: 1955-11-29
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Expires: 1973-07-22
Abstract
No abstract record available.
Inventors
- 👤 David M Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:04
CPC Classifications
E; E05; E05D; E05D15/00; E05D15/40; E05D15/42; E05D15/425; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
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) | 1958-11-28 | 1959-05-30 | 1959-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-28 | 1963-05-30 | 1963-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-28 | 1967-05-30 | 1967-11-29 | $7700.00 | Window Closed / Lapsed |