Patent US1802391A successfully refreshed from Google Patents.
US1802391A
Expired / Lapsed
US
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Typewriting machine
Assignee: Underwood Elliott Fisher Co
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Filing: 1926-07-15
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Granted: 1931-04-28
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Expires: 1946-07-15
Abstract
No abstract record available.
Inventors
- 👤 Alfred E Oswald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:08
CPC Classifications
B; B41; B41J; B41J23/00; B41J23/02; B41J23/14
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) | 1934-04-27 | 1934-10-27 | 1935-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-04-27 | 1938-10-27 | 1939-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-04-27 | 1942-10-27 | 1943-04-28 | $7700.00 | Window Closed / Lapsed |