US2915906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring drive apparatus
Assignee: International Business Machines Corp
•
Filing: 1957-11-01
•
Granted: 1959-12-08
•
Expires: 1977-11-01
Abstract
No abstract record available.
Inventors
- 👤 George W Scott
- 👤 William R Maclay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:28
CPC Classifications
F; F16; F16D; F16D3/00; F16D3/02; F16D3/12; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1503; Y10T74/1524
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1776360A
Cited
US2326948A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-07 | 1963-06-08 | 1963-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-07 | 1967-06-08 | 1967-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-07 | 1971-06-08 | 1971-12-08 | $7700.00 | Window Closed / Lapsed |