US2631840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coil spring construction
Assignee: Individual
•
Filing: 1949-01-27
•
Granted: 1953-03-17
•
Expires: 1969-01-27
Abstract
No abstract record available.
Inventors
- 👤 George H Bugenhagen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:39
CPC Classifications
F; F16; F16F; F16F3/00; F16F3/02; F16F3/04; A; A47; A47C; A47C23/00; A47C23/04; A47C23/043; A47C23/0433; B; B21; B21F; B21F3/00; B21F3/12; B21F35/00; B21F35/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-16 | 1956-09-15 | 1957-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-16 | 1960-09-15 | 1961-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-16 | 1964-09-15 | 1965-03-17 | $7700.00 | Window Closed / Lapsed |