US2483181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring group
Assignee: American Steel Foundries
•
Filing: 1948-05-19
•
Granted: 1949-09-27
•
Expires: 1968-05-19
Abstract
No abstract record available.
Inventors
- 👤 Clasen Claus J Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:57
CPC Classifications
B; B61; B61F; B61F5/00; B61F5/02; B61F5/04; B61F5/12; B61F5/122
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1977177A
Cited
US1946670A
Cited
US2118006A
Cited
US2078703A
Cited
US2197783A
Cited
US2356742A
Cited
US2398751A
Cited
US2413458A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-26 | 1953-03-28 | 1953-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-26 | 1957-03-28 | 1957-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-26 | 1961-03-28 | 1961-09-27 | $7700.00 | Window Closed / Lapsed |