Patent US405504A successfully refreshed from Google Patents.
Patent US2981622A successfully refreshed from Google Patents.
US2981622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic process
Assignee: Individual
•
Filing: 1959-07-13
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Granted: 1961-04-25
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Expires: 1979-07-13
Abstract
No abstract record available.
Inventors
- 👤 Chalkley Lyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:48
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/72; G03C1/725; G03C1/73; G03C1/732
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
97 words
THE PHOTOGRAPHIC PROCESS COMPRISING THE STEPS OF IRRADIATING A PHOTOSENSITIVE PHOTOGRAPHIC MATERIAL SENSITIZED WITH A COMBINATION OF A HETEROPOLYACID OF A METAL CHOSEN FROM THE GROUP CONSISTING OF MOLYBDENUM AND TUNGSTEN AND A CARBONACEOUS REDUCING AGENT CHOSEN FROM THE GROUP CONSISTING OF POLYHYDRIC ALCOHOL, POLYETHER, POLYUAMID, ALDEHYDE, LEUCOBASE OF A TRIPHENYLMETHANE DYE, LEUCOBASE OF A XANTHENE DYE TO FORM A LATENT IMAGE AND DEVELOPING THE LATENT IMAGE INTO A VISIBLE IMAGE BY PHYSICAL DEVELOPMENT WHICH DEPOSITS FROM A SOLUTION CONTAINING A METALLIC SALT A LIGHT ABSORBING METALLIC SUBSTANCE UPON THE IRRADIATED PORTIONS OF THE PHOTOSENSITIVE PHOTOGRAPHIC MATERIAL.
References Cited (Backward Citations)
GB190713726A
Cited
US1934451A
Cited
US2084420A
Cited
US2427443A
Cited
GB670883A
Cited
US2895892A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |