US3053987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exploring photographic densities
Assignee: Individual
•
Filing: 1959-09-02
•
Granted: 1962-09-11
•
Expires: 1979-09-02
Abstract
No abstract record available.
Inventors
- 👤 Cook Alan Hugh
- 👤 Hitchins Robert George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:29
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/59; G01N21/5907; G01N21/5911
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2489305A
Cited
US2674916A
Cited
US2848921A
Cited
US2880512A
Cited
US2773414A
Cited
US2892948A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-10 | 1966-03-12 | 1966-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-10 | 1970-03-12 | 1970-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-10 | 1974-03-12 | 1974-09-11 | $7700.00 | Window Closed / Lapsed |