US2832985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning apparatus for photographic film negatives
Assignee: Individual
•
Filing: 1954-09-10
•
Granted: 1958-05-06
•
Expires: 1974-09-10
Abstract
No abstract record available.
Inventors
- 👤 Albert T Durling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:15
CPC Classifications
G; G03; G03D; G03D15/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US746618A
Cited
US1575346A
Cited
US2059197A
Cited
US2099012A
Cited
US2127477A
Cited
US2257836A
Cited
US2247211A
Cited
US2408438A
Cited
GB600236A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |