Patent US3047675A successfully refreshed from Google Patents.
US3047675A
Expired / Lapsed
US
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Digital data recording device
Assignee: MECHRON SAN FRANCISCO
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Filing: 1959-06-19
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Granted: 1962-07-31
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Expires: 1979-06-19
Abstract
No abstract record available.
Inventors
- 👤 Joseph L Berryhill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:03
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/84; H04N5/87; H04N5/91; H04N5/92; H04N5/926
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1956351A
Cited
US1950518A
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US2314382A
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US2330331A
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US2307825A
Cited
US2561181A
Cited
US2540654A
Cited
US2817829A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-30 | 1966-01-29 | 1966-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-30 | 1970-01-29 | 1970-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-30 | 1974-01-29 | 1974-07-31 | $7700.00 | Window Closed / Lapsed |