US3159487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive diazotype material comprising a starch, silica and a binder
Assignee: Keuffel and Esser Co
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Filing: 1961-09-21
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Granted: 1964-12-01
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Expires: 1981-09-21
Abstract
No abstract record available.
Inventors
- 👤 Wilhelm A Krieger
- 👤 May Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:19
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/91; G03C1/93; G03C1/52; G03C1/60
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
136 words
A PHOTOSENSITIVE DIAZOTYPE MATERIAL COMPRISING A PAPER SHEET AND A PHOTOSENSITIVE DIAZOTYPE LAYER COATED ON SAID SHEET, SAID LAYER COMPRISING NON-SWOLLEN STARCH PARTICLES SELECTED FROM THE GROUP CONSISTING OF CORN STARCH PARTICLES, TAPIOCA STARCH PARTICLES, POTATO STARCH PARTICLES, WHEAT STARCH PARTICLES, SAGO STARCH PARTICLES, ARROWROOT STARCH PARTICLES, BARLEY STARCH PARTICLES, SORGHUM STARCH PARTICLES, SWEET POTATO STARCH PARTILCES AND WAXY MAIZE STARCH PARTICLES, AN ORGANIC BINDER SELECTED FROM THE GROUP CONSISTING OF POLYVINYL ACTATES, CASEIN, CASEINATES, GELATING, GUM ARABIC AND HYDROXYETHYL CELLULOSE, FINELY DIDVIDED SILICA, AND A PHOTOSENSITIVE DIAZONIUM COMPOUND, SAID STARCH PARTICLES HAVING A PARTICLE SIZE RANGE OF 2 MICRONS TO 100 MICRONS WITH AN AVERAGE PARTICLE SIZE OF AT LEAST 10 MICRONS, SAID SILICA HAVING A PARTICLE SIZE RANGE OF 0.015 MICRON TO 10 MICRONS WITH AN AVERAGE PARTICLE SIZE NO GREATER THAN 1 MICRON.
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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) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |