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Patent US3204944A successfully refreshed from Google Patents.
US3204944A
Expired / Lapsed
US
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Tapered springs and methods of manufacturing same
Assignee: Rockwell-Standard Corp
•
Filing: 1963-03-26
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Granted: 1965-09-07
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Expires: 1983-03-26
Abstract
No abstract record available.
Inventors
- 👤 Nelson R Brownyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:13
CPC Classifications
F; F16; F16F; F16F1/00; F16F1/02; F16F1/18; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49609; Y10T29/49611
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A LEAF SPRING UNIT OF NON-UNIFORM TRANSVERSE CROSS SECTION ALONG AT LEAST THE MAJOR PORTION OF ITS LENGTH COMPRISING A PLURALITY OF PREFORMED ADJACENT METAL LEAVES ALL PERMANENTLY BONDED TOGETHER OVER THEIR ENTIRE COEXTENSIVE
Claim 2
Dependent Claim
34 words
A LEAF SPRING UNIT OF NON-UNIFORM TRANSVERSE CROSS SECTION ALONG AT LEAST THE MAJOR PORTION OF ITS LENGTH COMPRISING A PLURALITY OF PREFORMED ADJACENT METAL LEAVES ALL PERMANENTLY BONDED TOGETHER OVER THEIR ENTIRE COEXTENSIVE
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |