Patent US2800573A successfully refreshed from Google Patents.
US2800573A
Expired / Lapsed
US
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Detachable typewriter lamp
Assignee: WILLIAM E COLE II
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Filing: 1953-11-12
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Granted: 1957-07-23
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Expires: 1973-11-12
Abstract
No abstract record available.
Inventors
- 👤 Russell O Hudson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:01
CPC Classifications
B; B41; B41J; B41J29/00; B41J29/18; B41J29/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1326650A
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US1236269A
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US1353033A
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US1764071A
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US1886027A
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FR771545A
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US2295210A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-22 | 1961-01-21 | 1961-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-22 | 1965-01-21 | 1965-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-22 | 1969-01-21 | 1969-07-23 | $7700.00 | Window Closed / Lapsed |