Patent US4789662A successfully refreshed from Google Patents.
US2543370A
Expired / Lapsed
US
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Spring coiling and assembling
Assignee: Lincoln Engineering Co
•
Filing: 1948-03-15
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Granted: 1951-02-27
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Expires: 1968-03-15
Abstract
No abstract record available.
Inventors
- 👤 Kludt Jonathan
- 👤 Parks Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:26
CPC Classifications
B; B21; B21F; B21F11/00; B21F11/005; B21F23/00; B21F3/00; B21F3/02; B21F3/06; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5191
Claims Analysis
Total Claims: 0
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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) | 1954-02-26 | 1954-08-28 | 1955-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-26 | 1958-08-28 | 1959-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-26 | 1962-08-28 | 1963-02-27 | $7700.00 | Window Closed / Lapsed |