US2902136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ribbon mechanism
Assignee: International Business Machines Corp
•
Filing: 1957-12-20
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Granted: 1959-09-01
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Expires: 1977-12-20
Abstract
No abstract record available.
Inventors
- 👤 Walter B Whippo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:17
CPC Classifications
B; B41; B41J; B41J33/00; B41J33/14; B41J33/36; B41J33/40; B41J33/44; B41J33/51; B41J33/518; B41J35/00; B41J35/04; B41J35/10; B41J35/12; B41J35/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1937145A
Cited
DE682804C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |