US3457674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic balanced door operator
Assignee: GYRO Tech DOOR CO
•
Filing: 1967-03-22
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Granted: 1969-07-29
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Expires: 1987-03-22
Abstract
No abstract record available.
Inventors
- 👤 John C Catlett
- 👤 James R Gilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:12
CPC Classifications
E; E05; E05D; E05D15/00; E05D15/28; E05D15/30; E05F; E05F15/00; E05F15/60; E05F15/603; E05F15/611; E05F15/614; E05Y; E05Y2201/00; E05Y2201/40; E05Y2201/43; E05Y2201/434; E05Y2600/00; E05Y2600/40; E05Y2600/46; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132; F; F16; F16H; F16H49/00; F16H49/001
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) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |