US2574134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contact spring assembly or the like and method of producing the same
Assignee: Individual
•
Filing: 1946-06-04
•
Granted: 1951-11-06
•
Expires: 1966-06-04
Abstract
No abstract record available.
Inventors
- 👤 Vigren Sten Daniel
- 👤 Holmqvist Nils Evert Fridolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:39
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/12; H01H1/14; H01H1/24; H01H1/26; H01H1/28; H01H50/00; H01H50/54; H01H50/56; H01H50/58; H01R; H01R4/00; H01R4/28; H01R4/48; H01R2107/00; Y; Y10; Y10S; Y10S411/00; Y10S411/918; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49204
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1977299A
Cited
US2172927A
Cited
US2177377A
Cited
US2277443A
Cited
US2350887A
Cited
US2312408A
Cited
US2395300A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-05 | 1955-05-07 | 1955-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-05 | 1959-05-07 | 1959-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-05 | 1963-05-07 | 1963-11-06 | $7700.00 | Window Closed / Lapsed |