US3244633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid developers for developing electrostatic images
Assignee: GAF Chemicals Corp
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Filing: 1961-10-24
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Granted: 1966-04-05
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Expires: 1981-10-24
Abstract
No abstract record available.
Inventors
- 👤 Yellin Wilbur
- 👤 Jr Donald E Rutter
- 👤 John W Weigl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:27
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/12; G03G9/13; G03G9/131; G03G9/132
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A LIQUID DEVELOPER FOR DEVELOPING NEGATIVELY CHARGED ELECTROSTATIC IMAGES INTO VISBLE NEGATIVE IMAGES CONSISTING ESSENTIALLY OF A DISPERSION OF A HYDROPHOBIC PIGMENTED LITHOGRAPHIC INK IN A CARRIER LIQUID HAVING A SPECIFIC RESISTIVITY OF AT LEAST ABOUT 10**10 OHM CENTIMETERS AND HAVING DISSOLVED THEREIN IN ADDITION A POLYMERIC FIXING AGENT SELECTED FROM THE CLASS CONSISTING OF A STYRENE AND BUTADIENE COPOLYMER HAVING THE RECURRING UNIT:
Claim 2
Dependent Claim
64 words
A LIQUID DEVELOPER FOR DEVELOPING NEGATIVELY CHARGED ELECTROSTATIC IMAGES INTO VISBLE NEGATIVE IMAGES CONSISTING ESSENTIALLY OF A DISPERSION OF A HYDROPHOBIC PIGMENTED LITHOGRAPHIC INK IN A CARRIER LIQUID HAVING A SPECIFIC RESISTIVITY OF AT LEAST ABOUT 10**10 OHM CENTIMETERS AND HAVING DISSOLVED THEREIN IN ADDITION A POLYMERIC FIXING AGENT SELECTED FROM THE CLASS CONSISTING OF A STYRENE AND BUTADIENE COPOLYMER HAVING THE RECURRING UNIT:
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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) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |