Patent US2447473A successfully refreshed from Google Patents.
US2447473A
Expired / Lapsed
US
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Variable drum facsimile scanning mechanism
Assignee: Individual
•
Filing: 1944-08-26
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Granted: 1948-08-17
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Expires: 1964-08-26
Abstract
No abstract record available.
Inventors
- 👤 William G H Finch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:31
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/04; H04N1/06; H04N1/0671; H04N1/0678
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US957257A
Cited
US1695617A
Cited
US1966543A
Cited
US2086798A
Cited
US2108037A
Cited
US2153917A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-17 | 1952-02-16 | 1952-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-17 | 1956-02-16 | 1956-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-17 | 1960-02-16 | 1960-08-17 | $7700.00 | Window Closed / Lapsed |