US2653091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic diazotype composition and heat development thereof
Assignee: RCA Corp
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Filing: 1950-01-31
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Granted: 1953-09-22
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Expires: 1970-01-31
Abstract
No abstract record available.
Inventors
- 👤 Harold G Greig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:25
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/61
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
IN A PROCESS FOR REPRODUCING IMAGES, THE STEPS OF: PROVIDING A STRATUM CONTAINING A LIGHTSENSITIVE DIAZONIUM COMPOUND STABILIZED WITH TRICHLORACETIC ACID, EXPOSING THE STRATUM TO ACTINIC LIGHT DISTRIBUTED TO CORRESPOND TO THE IMAGE TO BE REPRODUCED FOR DEACTIVATING THE ILLUMINATED STRATUM PORTIONS: AND DEVELOPING THE IMAGE REPRODUCTION BY HEATING THE EXPOSED STRATUM IN THE PRESENCE OF A SALT OF SAID ACID SELECTED FROM THE CLASS CONSISTING OF SODIUM, POTASSIUM, AMMONIUM, AND MONO-, DI-, AND TRIETHANOLAMINE SALTS AND IN THE PRESENCE OF AN AZO DYE COUPLER TO DECOMPOSE THE STABILIZING TRICHLORACETIC ACID AND CAUSE THE PRODUCTION OF THE DIAZOTYPE COLOR.
Claim 2
Dependent Claim
99 words
IN A PROCESS FOR REPRODUCING IMAGES, THE STEPS OF: PROVIDING A STRATUM CONTAINING A LIGHTSENSITIVE DIAZONIUM COMPOUND STABILIZED WITH TRICHLORACETIC ACID, EXPOSING THE STRATUM TO ACTINIC LIGHT DISTRIBUTED TO CORRESPOND TO THE IMAGE TO BE REPRODUCED FOR DEACTIVATING THE ILLUMINATED STRATUM PORTIONS: AND DEVELOPING THE IMAGE REPRODUCTION BY HEATING THE EXPOSED STRATUM IN THE PRESENCE OF A SALT OF SAID ACID SELECTED FROM THE CLASS CONSISTING OF SODIUM, POTASSIUM, AMMONIUM, AND MONO-, DI-, AND TRIETHANOLAMINE SALTS AND IN THE PRESENCE OF AN AZO DYE COUPLER TO DECOMPOSE THE STABILIZING TRICHLORACETIC ACID AND CAUSE THE PRODUCTION OF THE DIAZOTYPE COLOR.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-21 | 1957-03-23 | 1957-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-21 | 1961-03-23 | 1961-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-21 | 1965-03-23 | 1965-09-22 | $7700.00 | Window Closed / Lapsed |