Patent US2632801A successfully refreshed from Google Patents.
US2632801A
Expired / Lapsed
US
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Deep well camera
Assignee: Individual
•
Filing: 1948-06-05
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Granted: 1953-03-24
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Expires: 1968-06-05
Abstract
No abstract record available.
Inventors
- 👤 Charles A Donaldson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:56
CPC Classifications
G; G03; G03B; G03B37/00; G03B37/005; E; E21; E21B; E21B47/00; E21B47/002; G02; G02B; G02B23/00; G02B23/24; G02B23/2407; G02B23/2423
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-23 | 1956-09-22 | 1957-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-23 | 1960-09-22 | 1961-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-23 | 1964-09-22 | 1965-03-24 | $7700.00 | Window Closed / Lapsed |