US3345727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making taper leaf springs
Assignee: Rockwell-Standard Corp
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Filing: 1965-04-20
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Granted: 1967-10-10
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Expires: 1985-04-20
Abstract
No abstract record available.
Inventors
- 👤 Rostislaw S Komarnitsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:28
CPC Classifications
B; B60; B60G; B60G11/00; B60G11/02; B60G11/10; B60G11/113; B21; B21D; B21D53/00; B21D53/88; B21D53/886; C; C21; C21D; C21D7/00; C21D7/02; C21D7/04; C21D7/06; C21D9/00; C21D9/02; B60G2206/00; B60G2206/01; B60G2206/40; B60G2206/42; B60G2206/428; B60G2206/80; B60G2206/81; B60G2206/8102; B60G2206/81022; B60G2206/8106; B60G2206/84; B60G2206/8403; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49609; Y10T29/49615; Y10T29/49995
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
IN THE METHOD OF MAKING A TAPERED LEAF SPRING WHEREIN A BLANK IS TAPER ROLLED, HEAT TREATED, AND THEN STRAIN PEENED ON THE SIDE WHICH IS THE TENSION SURFACE IN THE FINISHED SPRING, THE STEP OF GRINDING SAID TENSION SURFACE AND THE ADJACENT LONGITUDINAL SIDE EDGE AREAS PRIOR TO STRAIN PEENING.
Claim 2
Dependent Claim
51 words
IN THE METHOD OF MAKING A TAPERED LEAF SPRING WHEREIN A BLANK IS TAPER ROLLED, HEAT TREATED, AND THEN STRAIN PEENED ON THE SIDE WHICH IS THE TENSION SURFACE IN THE FINISHED SPRING, THE STEP OF GRINDING SAID TENSION SURFACE AND THE ADJACENT LONGITUDINAL SIDE EDGE AREAS PRIOR TO STRAIN PEENING.
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) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |