US2632801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deep well camera
Assignee: Individual
•
Filing: 1948-06-05
•
Granted: 1953-03-24
•
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
2026-10-22 18:29
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
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1857130A
Cited
US2019059A
Cited
US2110982A
Cited
US2209719A
Cited
US2291692A
Cited
US2334475A
Cited
US2258124A
Cited
US2359894A
Cited
US2298911A
Cited
US2394649A
Cited
US2428155A
Cited
US2450649A
Cited
US2433971A
Cited
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 |