US2211760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring and method of making the same
Assignee: Individual
•
Filing: 1937-12-08
•
Granted: 1940-08-20
•
Expires: 1957-12-08
Abstract
No abstract record available.
Inventors
- 👤 Alfred J Berg
- 👤 John O Huse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:17
CPC Classifications
B; B21; B21F; B21F3/00; B21F3/02; B21F3/06; B21D; B21D53/00; B21D53/16; B21D53/20; Y; Y10; Y10T; Y10T29/00; Y10T29/11; Y10T29/1163; Y10T29/49; Y10T29/49609; Y10T407/00; Y10T407/24; Y10T82/00; Y10T82/10; Y10T82/16; Y10T82/16016
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-08-20 | 1944-02-19 | 1944-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-08-20 | 1948-02-19 | 1948-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-08-20 | 1952-02-19 | 1952-08-20 | $7700.00 | Window Closed / Lapsed |