US3241998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fixing xerographic images
Assignee: Research Laboratories of Australia Pty Ltd
•
Filing: 1961-07-03
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Granted: 1966-03-22
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Expires: 1981-07-03
Abstract
No abstract record available.
Inventors
- 👤 Oliphant Keith Meredith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:32
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/02; B05D1/04; C; C25; C25D; C25D13/00; G; G03; G03G; G03G11/00; G03G9/00; G03G9/08; G03G9/12; G03G9/13; G03G9/132
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
206 words
THE METHOD OF FIXING IMAGE DEPOSITS TO AN ELECTROSTATIC CHARGE IMAGE OF GIVEN POLARITY ON AN ELECTROPHOTOGRAPHIC SURFACE WHICH COMPRISES FIRST DISSOLVING A RESINOUS FIXING MEDIUM THAT IS ATTRACTABLE TO AN ELECTROSTATIC CHARGE OF SAID GIVEN POLARITY IN A SOLVENT THEREFOR, PRECIPITATING SUCH FIXING MEDIUM BY ADDITION TO THE SOLUTION OF A LIQUID WHICH CAUSES PRECIPITATION OF THE FIXING MEDIUM IN PARTICULATE FORM BUT IN SOFTENED CONDITION DUE TO THE RENTENTION OF SOME OF THE SOLVENT, SUSPENDING THE SOFTENED PARTICULATE RESINOUS FIXING MEDIUM IN A CARRIER LIQUID WHICH IS A NON-SOLVENT FOR SUCH PARTICULATE FIXING MEDIUM AND WHICH HAS AN ELECTRICAL VOLUME RESISTIVITY OF AT LEAST 10**9 OHM CM. AND A DIELECTRIC CONSTANT OF LESS THAN THREE, WHEREBY SAID PARTICULATE FIXING MEDIUM MAY BE DEPOSITED ON CHARGE PORTIONS OF SAID IMAGE OF SAID GIVEN POLARITY, SUSPENDING A PARTICULATE DEVELOPER PIGMENT THAT IS ATTRACTABLE TO AN ELECTROSTATIC CHARGE OF SAID GIVEN POLARITY IN THE CARRIER LIQUID, APPLYING THE RESULTING SUSPENSION TO SAID SURFACE TO CO-DEPOSIT SAID PARTICULATE DEVELOPER PIGMENT AND SAID PARTICULATE RESINOUS FIXING MEDIUM ON SAID CHARGE IMAGE, AND THEREAFTER EVAPORATING SAID CARRIER LIQUID AND THE SOLVENT CONTAINED IN SAID RESINOUS FIXING MEDIUM PARTICLES TO ADHERE SAID FIXING MEDIUM AND SAID DEVELOPER PIGMENT TO SAID SURFACE.
Claim 2
Independent Claim
206 words
THE METHOD OF FIXING IMAGE DEPOSITS TO AN ELECTROSTATIC CHARGE IMAGE OF GIVEN POLARITY ON AN ELECTROPHOTOGRAPHIC SURFACE WHICH COMPRISES FIRST DISSOLVING A RESINOUS FIXING MEDIUM THAT IS ATTRACTABLE TO AN ELECTROSTATIC CHARGE OF SAID GIVEN POLARITY IN A SOLVENT THEREFOR, PRECIPITATING SUCH FIXING MEDIUM BY ADDITION TO THE SOLUTION OF A LIQUID WHICH CAUSES PRECIPITATION OF THE FIXING MEDIUM IN PARTICULATE FORM BUT IN SOFTENED CONDITION DUE TO THE RENTENTION OF SOME OF THE SOLVENT, SUSPENDING THE SOFTENED PARTICULATE RESINOUS FIXING MEDIUM IN A CARRIER LIQUID WHICH IS A NON-SOLVENT FOR SUCH PARTICULATE FIXING MEDIUM AND WHICH HAS AN ELECTRICAL VOLUME RESISTIVITY OF AT LEAST 10**9 OHM CM. AND A DIELECTRIC CONSTANT OF LESS THAN THREE, WHEREBY SAID PARTICULATE FIXING MEDIUM MAY BE DEPOSITED ON CHARGE PORTIONS OF SAID IMAGE OF SAID GIVEN POLARITY, SUSPENDING A PARTICULATE DEVELOPER PIGMENT THAT IS ATTRACTABLE TO AN ELECTROSTATIC CHARGE OF SAID GIVEN POLARITY IN THE CARRIER LIQUID, APPLYING THE RESULTING SUSPENSION TO SAID SURFACE TO CO-DEPOSIT SAID PARTICULATE DEVELOPER PIGMENT AND SAID PARTICULATE RESINOUS FIXING MEDIUM ON SAID CHARGE IMAGE, AND THEREAFTER EVAPORATING SAID CARRIER LIQUID AND THE SOLVENT CONTAINED IN SAID RESINOUS FIXING MEDIUM PARTICLES TO ADHERE SAID FIXING MEDIUM AND SAID DEVELOPER PIGMENT TO SAID SURFACE.
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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) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |