Patent US2690697A successfully refreshed from Google Patents.
US2690697A
Expired / Lapsed
US
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Electrical-mechanical typewriter projection apparatus
Assignee: Individual
•
Filing: 1953-02-04
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Granted: 1954-10-05
•
Expires: 1973-02-04
Abstract
No abstract record available.
Inventors
- 👤 John L Rocca
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:54
CPC Classifications
B; B41; B41J; B41J3/00; B41J3/44; B41J3/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1081922A
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US1624669A
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US1889575A
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US1918468A
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US1894684A
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US2108053A
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US2027026A
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US2067835A
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US2174339A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-04 | 1958-04-05 | 1958-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-04 | 1962-04-05 | 1962-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-04 | 1966-04-05 | 1966-10-05 | $7700.00 | Window Closed / Lapsed |