US3714680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Counter-balance support
Assignee: Weber Knapp Co
•
Filing: 1971-11-17
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Granted: 1973-02-06
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Expires: 1991-11-17
Abstract
Abstract A COUNTER-BALANCE SUPPORT FOR A SUSPENDED LID INCLUDING A PAIR OF COMPRESSION SPRINGS ACTING ALTERNATIVELY TOGETHER AND IN OPPOSITION FOR EFFECTIVELY COUNTER-BALANCING THE WEIGHT OF THE LID DURING VERTICAL SWINGING MOVEMENT THEREOF.
Inventors
- 👤 C Little
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:38
CPC Classifications
F; F16; F16F; F16F15/00; F16F15/02; F16F15/04; F16F15/06; F16F15/067; E; E05; E05F; E05F1/00; E05F1/08; E05F1/10; E05F1/12; E05F1/1246; E05F1/1253; E05F1/1261; E05Y; E05Y2201/00; E05Y2201/60; E05Y2201/622; E05Y2201/686; E05Y2900/00; E05Y2900/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |