Patent US2911053A successfully refreshed from Google Patents.
US3293183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developer for electrostatic images
Assignee: Research Laboratories of Australia Pty Ltd
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Filing: 1962-08-08
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Granted: 1966-12-20
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Expires: 1982-08-08
Abstract
No abstract record available.
Inventors
- 👤 Josef Matkan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:46
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/12; G03G9/13; G03G9/132; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/105
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
FOR DEVELOPING ELECTROSTATIC IMAGES A DEVELOPER CONSISTING ESSENTIALLY OF AN ELECTRICALLY INSULATING HYDROCARBON CARRIER LIQUID HAVING A VOLUME RESISTIVITY IN EXCESS OF 109 OHM CM., PIGMENT PARTICLES SUSPENDED IN SAID CARRIER LIQUID AND ALSO DISPERSED IN SAID CARRIER LIQUID A CELLULOSE POLYMER BUT WHICH IS SUBSTANTIALLY SOLUBLE IN A HYDROCARBON SOLVENT WHICH IS MISCIBLE WITH SAID CARRIER LIQUID AND WHICH HAS A DB VALUE IN EXCESS OF 90.
Claim 2
Dependent Claim
68 words
FOR DEVELOPING ELECTROSTATIC IMAGES A DEVELOPER CONSISTING ESSENTIALLY OF AN ELECTRICALLY INSULATING HYDROCARBON CARRIER LIQUID HAVING A VOLUME RESISTIVITY IN EXCESS OF 109 OHM CM., PIGMENT PARTICLES SUSPENDED IN SAID CARRIER LIQUID AND ALSO DISPERSED IN SAID CARRIER LIQUID A CELLULOSE POLYMER BUT WHICH IS SUBSTANTIALLY SOLUBLE IN A HYDROCARBON SOLVENT WHICH IS MISCIBLE WITH SAID CARRIER LIQUID AND WHICH HAS A DB VALUE IN EXCESS OF 90.
References Cited (Backward Citations)
US2758939A
Cited
US2907674A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |