US2817390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring and spring assembly
Assignee: ROCKWEL SPRING AND AXLE Co
•
Filing: 1954-02-19
•
Granted: 1957-12-24
•
Expires: 1974-02-19
Abstract
No abstract record available.
Inventors
- 👤 Nelson A Crites
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:18
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/02; A47C7/28; A47C7/285
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US147247A
Cited
US1993530A
Cited
US2115400A
Cited
US2202301A
Cited
US2313171A
Cited
US2302479A
Cited
US2439530A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-23 | 1961-06-24 | 1961-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-23 | 1965-06-24 | 1965-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-23 | 1969-06-24 | 1969-12-24 | $7700.00 | Window Closed / Lapsed |