US3478408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for forming helical springs and the like
Assignee: SWANTON WILLIAM F
•
Filing: 1965-10-21
•
Granted: 1969-11-18
•
Expires: 1985-10-21
Abstract
No abstract record available.
Inventors
- 👤 Kenard Daniel Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:17
CPC Classifications
B; B21; B21F; B21F3/00; B21F3/02; B21F3/04; B21D; B21D11/00; B21D11/06; B21F17/00; B65; B65H; B65H81/00; B65H81/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49885; Y10T29/49908
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1063505A
Cited
US1258091A
Cited
GB152684A
Cited
US1703250A
Cited
US1856243A
Cited
US1950623A
Cited
US2290380A
Cited
US2651104A
Cited
US2614606A
Cited
US2667204A
Cited
US2760229A
Cited
US3019834A
Cited
US3099310A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-17 | 1973-05-19 | 1973-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-17 | 1977-05-19 | 1977-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-17 | 1981-05-19 | 1981-11-18 | $7700.00 | Window Closed / Lapsed |