Patent US3849671A successfully refreshed from Google Patents.
Patent US2613149A successfully refreshed from Google Patents.
US2613149A
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Diazotype photoprinting material
Assignee: GAF Chemicals Corp
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Filing: 1947-10-29
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Granted: 1952-10-07
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Expires: 1967-10-29
Abstract
No abstract record available.
Inventors
- 👤 Henry C Unkauf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:14
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/61
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A DIAZOTYPE SENSITIZING SOLUTION FOR WATERREPELLENT VINYL POLYMER RESINS OF THE CLASS CONSISTING OF POLYMERS OF VINYL CHLORIDE AND VINYLIDENE CHLORIDE, AND COPOLYMERS OF VINYL CHLORIDE WITH VINYL ACETATE AND OF VINYL CHLORIDE WITH MALEIC ACID, COMPRISING AS THE SOLVENT MEDIUM THEREOF, A MIXTURE OF A GAMMA-LACTONE HAVING 4 TO 6 CARBON ATOMS WITH AT LEAST ONE LOW BOILING KETONE, SAID SOLUTION CONTAINING A LIGHT SENSITIVE DIAZO COMPOUND DISSOLVED IN SAID SOLVENT MEDIUM.
Claim 2
Dependent Claim
73 words
A DIAZOTYPE SENSITIZING SOLUTION FOR WATERREPELLENT VINYL POLYMER RESINS OF THE CLASS CONSISTING OF POLYMERS OF VINYL CHLORIDE AND VINYLIDENE CHLORIDE, AND COPOLYMERS OF VINYL CHLORIDE WITH VINYL ACETATE AND OF VINYL CHLORIDE WITH MALEIC ACID, COMPRISING AS THE SOLVENT MEDIUM THEREOF, A MIXTURE OF A GAMMA-LACTONE HAVING 4 TO 6 CARBON ATOMS WITH AT LEAST ONE LOW BOILING KETONE, SAID SOLUTION CONTAINING A LIGHT SENSITIVE DIAZO COMPOUND DISSOLVED IN SAID SOLVENT MEDIUM.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-07 | 1956-04-07 | 1956-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-07 | 1960-04-07 | 1960-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-07 | 1964-04-07 | 1964-10-07 | $7700.00 | Window Closed / Lapsed |