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US3352677A
Expired / Lapsed
US
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Transparentizing base stock of tracing papers and intermediate diazotype papers by use of polypropenes
Assignee: GAF Chemicals Corp
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Filing: 1963-06-24
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Granted: 1967-11-14
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Expires: 1983-06-24
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Kosalek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:31
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/775; G03C1/785; D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/35; G03C1/52; Y; Y10; Y10S; Y10S428/00; Y10S428/918
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
91 words
A PROCESS FOR THE PRODUCTION OF LIGHT-SENSITIVE DIAZO MATERIAL HAVING A TRANSPARENTIZED PAPER BASE WHICH COMPRISES IMPREGNATING PAPER BASE STOCK WITH A SOLUTION OF A RESIN CONSISTING ESSENTIALLY OF POLYPROPENE IN AN ORGANIC SOLVENT SELECTED FROM THE CLASS CONSISTING OF SOLVENT NAPHTHA, XYLENE AND TOLUENE, WINDING THE PAPER WHILE WET WITH SAID SOLUTION IN A ROLL, ALLOWING IT TO STAND FOR A PERIOD OF AT LEAST FOUR DAYS, DRYING, WETTING ONE SURFACE WITH AN AQUEOUS SOLUTION TO PREVENT CURL, AND APPLYING TO THE OPPOSITE SURFACE AN AQUEOUS LIGHT-SENSITIVE DIAZO COMPOUND SOLUTION.
Claim 2
Dependent Claim
91 words
A PROCESS FOR THE PRODUCTION OF LIGHT-SENSITIVE DIAZO MATERIAL HAVING A TRANSPARENTIZED PAPER BASE WHICH COMPRISES IMPREGNATING PAPER BASE STOCK WITH A SOLUTION OF A RESIN CONSISTING ESSENTIALLY OF POLYPROPENE IN AN ORGANIC SOLVENT SELECTED FROM THE CLASS CONSISTING OF SOLVENT NAPHTHA, XYLENE AND TOLUENE, WINDING THE PAPER WHILE WET WITH SAID SOLUTION IN A ROLL, ALLOWING IT TO STAND FOR A PERIOD OF AT LEAST FOUR DAYS, DRYING, WETTING ONE SURFACE WITH AN AQUEOUS SOLUTION TO PREVENT CURL, AND APPLYING TO THE OPPOSITE SURFACE AN AQUEOUS LIGHT-SENSITIVE DIAZO COMPOUND SOLUTION.
Claim 3
Dependent Claim
49 words
LIGHT-SENSITIVE DIAZO MATERIAL HAVING AS A BASE, PAPER TRANSPARENTIZED BY IMPREGNATING WITH A RESIN CONSISTING ESSENTIALLY OF POLYPROPENE DEPOSITED FROM A SOLUTION THEREOF IN A SOLVENT SELECTED FROM A CLASS CONSISTING OF SOLVENT NAPHTHA, XYLENE AND TOLUENE AND A LIGHT-SENSITIVE DIAZO COMPOUND COATED ON ONE SURFACE OF SAID BASE.
Claim 4
Dependent Claim
49 words
LIGHT-SENSITIVE DIAZO MATERIAL HAVING AS A BASE, PAPER TRANSPARENTIZED BY IMPREGNATING WITH A RESIN CONSISTING ESSENTIALLY OF POLYPROPENE DEPOSITED FROM A SOLUTION THEREOF IN A SOLVENT SELECTED FROM A CLASS CONSISTING OF SOLVENT NAPHTHA, XYLENE AND TOLUENE AND A LIGHT-SENSITIVE DIAZO COMPOUND COATED ON ONE SURFACE OF SAID BASE.
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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) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |