US3326686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-sensitive two-component diazotype materials adapted for heat development
Assignee: GAF Chemicals Corp
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Filing: 1963-05-31
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Granted: 1967-06-20
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Expires: 1983-05-31
Abstract
No abstract record available.
Inventors
- 👤 David I Randall
- 👤 Harlan B Freyermuth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:42
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/61
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A SENSITIZING COMPOSITION FOR DIAZOTYPE PHOTOPRINTING MATERIAL COMPRISING IN AQUEOUS MEDIUM AN AZO COUPLING COMPONENT, A LIGHT-SENSITIVE DIAZONIUM SALT, AN ACID STABLIZER AGAINST COUPLING, ALL SUCH STABILIZERS OF THE CONPOSITION HAVING A DISSOCIATION CONSTANT AT 25*C. WITHIN THE RANGE OF 10**-1.5 TO 10**-5, AND A NEUTRAL SALT OF TRICHLOROACETIC ACID SELECTED FROM THE CLASS CONSISTING OF SODIUM, POTASSIUM AND AMMONIUM SALTS, IN AN AMOUNT EXCEEDING THE STOICHIOMETRIC EQUIVALENT OF THE AMOUNT OF BASE REQUIRED TO NEUTRALIZE SAID ACID STABILIZER.
Claim 2
Dependent Claim
79 words
A SENSITIZING COMPOSITION FOR DIAZOTYPE PHOTOPRINTING MATERIAL COMPRISING IN AQUEOUS MEDIUM AN AZO COUPLING COMPONENT, A LIGHT-SENSITIVE DIAZONIUM SALT, AN ACID STABLIZER AGAINST COUPLING, ALL SUCH STABILIZERS OF THE CONPOSITION HAVING A DISSOCIATION CONSTANT AT 25*C. WITHIN THE RANGE OF 10**-1.5 TO 10**-5, AND A NEUTRAL SALT OF TRICHLOROACETIC ACID SELECTED FROM THE CLASS CONSISTING OF SODIUM, POTASSIUM AND AMMONIUM SALTS, IN AN AMOUNT EXCEEDING THE STOICHIOMETRIC EQUIVALENT OF THE AMOUNT OF BASE REQUIRED TO NEUTRALIZE SAID ACID STABILIZER.
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) | 1970-06-19 | 1970-12-19 | 1971-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-19 | 1974-12-19 | 1975-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-19 | 1978-12-19 | 1979-06-20 | $7700.00 | Window Closed / Lapsed |