US3339908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tapered leaf springs
Assignee: Rockwell-Standard Corp
•
Filing: 1965-04-20
•
Granted: 1967-09-05
•
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
2026-11-04 10:12
CPC Classifications
F; F16; F16F; F16F1/00; F16F1/02; F16F1/18; F16F2226/00; F16F2226/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49609; Y10T29/49611; Y10T29/49615
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A FINISHED SPRING LEAF COMPRISING A MECHANICALLY WORKED HEAT TREATED LENGTH OF STEEL HAVING ONE SURFACE TAPER ROLLED TO DESIRED CONTOUR, AND ITS TENSION SURFACE AND ADJACENT LONGITUDINAL SIDE EDGE SURFACES GROUNN AND MECHANICALLY WORKED TO INTRODUCE BENEFICAL RESIDUAL STRESSES.
Claim 2
Dependent Claim
40 words
A FINISHED SPRING LEAF COMPRISING A MECHANICALLY WORKED HEAT TREATED LENGTH OF STEEL HAVING ONE SURFACE TAPER ROLLED TO DESIRED CONTOUR, AND ITS TENSION SURFACE AND ADJACENT LONGITUDINAL SIDE EDGE SURFACES GROUNN AND MECHANICALLY WORKED TO INTRODUCE BENEFICAL RESIDUAL STRESSES.
References Cited (Backward Citations)
GB959801A
Cited
US3238072A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |