Patent US2139633A successfully refreshed from Google Patents.
US2139633A
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Art of synchronizing ribbon speeds and of producing composite ribbons
Assignee: MILPRINT PRODUCTS Corp
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Filing: 1937-05-27
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Granted: 1938-12-06
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Expires: 1957-05-27
Abstract
No abstract record available.
Inventors
- 👤 Roy E Hanson
- 👤 George O Frostad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:49
CPC Classifications
B; B31; B31F; B31F1/00; B31F1/20; B31F1/24; B31F1/26; B31F1/28; B31F1/2831; Y; Y10; Y10T; Y10T83/00; Y10T83/242
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) | 1941-12-05 | 1942-06-06 | 1942-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-12-05 | 1946-06-06 | 1946-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-12-05 | 1950-06-06 | 1950-12-06 | $7700.00 | Window Closed / Lapsed |