US1690487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Attachment for calculating machines
Assignee: Unisys Corp
•
Filing: 1925-12-21
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Granted: 1928-11-06
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Expires: 1945-12-21
Abstract
No abstract record available.
Inventors
- 👤 Allen A Horton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:00
CPC Classifications
B; B41; B41J; B41J33/00; B41J33/14; B41J33/40; B41J33/44; B41J33/51; B41J33/516
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1931-11-06 | 1932-05-07 | 1932-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-11-06 | 1936-05-07 | 1936-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-11-06 | 1940-05-07 | 1940-11-06 | $7700.00 | Window Closed / Lapsed |