US2814481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated spring
Assignee: Motors Liquidation Co
•
Filing: 1952-08-16
•
Granted: 1957-11-26
•
Expires: 1972-08-16
Abstract
No abstract record available.
Inventors
- 👤 Robert M Van House
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:39
CPC Classifications
F; F16; F16F; F16F1/00; F16F1/02; F16F1/18; F16F1/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
67 words
A COMPOSITE LEAF SPRING ASSEMBLY HAVING AN INCREASED ENERGY STORAGE CAPACITY COMPRISING A PLURALITY OF SUPERIMPOSED LEAVES, EACH OF SAID LEAVES INCLUDING A CORE MEMBER HAVING A THICKNESS OF APPROXIMATELY 3/16 INCH FORMED OF A METAL ALLOY OF THE CLASS CONSISTING OF ALUMINUM BASE AND MAGNESIUM BASE ALLOYS WITH OUTER LAYERS OF FERROUS METAL HAVING A THICKNESS OF APPROXIMATELY .03 INCH ADHESIVELY BONDED TO SAID CORE MEMBER.
References Cited (Backward Citations)
GB191508162A
Cited
US1638516A
Cited
US2056816A
Cited
FR760173A
Cited
US2376854A
Cited
US2653889A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-25 | 1961-05-27 | 1961-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-25 | 1965-05-27 | 1965-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-25 | 1969-05-27 | 1969-11-26 | $7700.00 | Window Closed / Lapsed |