Patent US2993803A successfully refreshed from Google Patents.
US2993803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing diazotype paper
Assignee: GAF Chemicals Corp
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Filing: 1958-08-08
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Granted: 1961-07-25
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Expires: 1978-08-08
Abstract
No abstract record available.
Inventors
- 👤 Jr John Sulich
- 👤 Botkin Carl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:28
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/76; G03C1/775; G03C1/79
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A PROCESS OF PRODUCING A LIGHT-SENSITIVE DIAZOTYPE PAPER WHICH COMPRISES FIRST COATING ONE SIDE OF A HIGHLY CALENDERED SMOOTH SURFACED PAPER HAVING A POROSITY TO ABOUT 100 ON THE TAPPI SCALE WITH AN AQUEOUS SOLUTION OF A WATER-SOLUBLE, FILM-FORMING MATERIAL, SELECTED FROM THE GROUP CONSISTING OF GELATIN, HYDROXYETHYL CELLULOSE, CARBOXYMETHYL CELLULOSE, METHYL CELLULOSE, CARBOXYMETHYL HYDROXYETHYL CELLULOSE, POLYVINYL ALCOHOL AND SODIUM CELLULOSE SULFATE, DRYING THE PAPER AND THEREAFTER COATING THE OTHER SIDE OF THE DRIED PAPER WITH A SOLUTION OF LIGHT-SENSITIVE DIAZOTYPE COMPOSITION AND DRYING.
Claim 2
Dependent Claim
84 words
A PROCESS OF PRODUCING A LIGHT-SENSITIVE DIAZOTYPE PAPER WHICH COMPRISES FIRST COATING ONE SIDE OF A HIGHLY CALENDERED SMOOTH SURFACED PAPER HAVING A POROSITY TO ABOUT 100 ON THE TAPPI SCALE WITH AN AQUEOUS SOLUTION OF A WATER-SOLUBLE, FILM-FORMING MATERIAL, SELECTED FROM THE GROUP CONSISTING OF GELATIN, HYDROXYETHYL CELLULOSE, CARBOXYMETHYL CELLULOSE, METHYL CELLULOSE, CARBOXYMETHYL HYDROXYETHYL CELLULOSE, POLYVINYL ALCOHOL AND SODIUM CELLULOSE SULFATE, DRYING THE PAPER AND THEREAFTER COATING THE OTHER SIDE OF THE DRIED PAPER WITH A SOLUTION OF LIGHT-SENSITIVE DIAZOTYPE COMPOSITION AND DRYING.
References Cited (Backward Citations)
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US2476240A
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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) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |