Patent US3516874A successfully refreshed from Google Patents.
US3516874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of increasing the fatigue life of metal parts
Assignee: Associated Spring Corp
•
Filing: 1969-05-01
•
Granted: 1970-06-23
•
Expires: 1989-05-01
Abstract
No abstract record available.
Inventors
- 👤 James H Maker
- 👤 George W Kurasz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:47
CPC Classifications
B; B23; B23P; B23P9/00; C; C22; C22F; C22F1/00; F; F16; F16F; F16F1/00; F16F1/02; F16F1/04; F16G; F16G1/00; F16G1/04; F16F2226/00; F16F2226/04; Y; Y10; Y10T; Y10T29/00; Y10T29/47; Y10T29/479; Y10T29/49; Y10T29/49609
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1973-06-22 | 1973-12-22 | 1974-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-22 | 1977-12-22 | 1978-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-22 | 1981-12-22 | 1982-06-23 | $7700.00 | Window Closed / Lapsed |