Patent US1688649A successfully refreshed from Google Patents.
Patent US2740895A successfully refreshed from Google Patents.
US2740895A
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Thermoprinting apparatus
Assignee: 3M Co
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Filing: 1950-08-21
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Granted: 1956-04-03
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Expires: 1970-08-21
Abstract
No abstract record available.
Inventors
- 👤 Carl S Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:47
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/02; G03B27/14; G03B27/30; G03B27/306; Y; Y10; Y10S; Y10S101/00; Y10S101/29
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1968037A
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US2556550A
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US2543013A
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US2503758A
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US2503759A
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US2523306A
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US2647464A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-03 | 1959-10-03 | 1960-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-03 | 1963-10-03 | 1964-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-03 | 1967-10-03 | 1968-04-03 | $7700.00 | Window Closed / Lapsed |