Patent US2943952A successfully refreshed from Google Patents.
US2943952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making duplicating transfer sheet and resultant article
Assignee: Unisys Corp
•
Filing: 1956-12-14
•
Granted: 1960-07-05
•
Expires: 1976-12-14
Abstract
No abstract record available.
Inventors
- 👤 Ralph H Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:43
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/10; Y; Y10; Y10S; Y10S428/00; Y10S428/914; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31906; Y10T428/31909; Y10T428/31928
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
182 words
A METHOD OF PRODUCING DUPLICATING ARTICLES SUCH AS LONG-LASTING CARBON PAPER AND THE LIKE COMPRISING: APPLYING TO A SURFACE OF A PAPER BACKING MEMBER, CAPABLE OF TRANSMITTING AN IMPRESSION, A COATING COMPOSITION COMPRISING A POLYVINYL CHLORIDE PLASTISOL DISPERSION RESIN AND A LIQUID VEHICLE THEREFOR, SAID LIQUID VEHICLE BEING SUBSTANTIALLY FREE OF VOLATILE INGREDIENTS AND INCLUDING A SUBSTANTIALLY NON-VOLATILE SOLVENT-TYPE PLASTICIZER FOR THE RESIN, SAID PLASTICIZER BEING PRESENT FROM ABOUT 1/2 TO 1 1/2 PARTS BY WEIGHT PER PART OF THE RESIN, HEATING THE COMPOSITION TO THE FUSING TEMPERATURE TO FUSE THE RESIN PARTICLES TO THE BACKOING MEMBER, APPLYING THEREOVER A COATING OF AN INK-TRANSFER COMPOSITION COMPRISING A VINYL CHLORIDE RESIN AND AN ACRYLIC RESIN SELECTED FROM THE GROUP CONSISTING OF POLYMERIZED ACRYLIC AND METHACRYLIC ESTERS OF LOWER ALIPHATIC ALCOHOLS, A VOLATILE SOLVENT FOR SAID RESINS, COLORING MATTER, AND A NONVOLATILE NONDRYING COLOR-CARRIER LIQUID EXPRESSIBLE WHEN SUBJECT OT PRESSURE FROM SAID SYNTHETIC RESIN WHEN IN SOLID FORM AFTER REMOVAL OF THE SOLVENT, SAID SOLVENT BEING SUBSTANTIALLY A NON-SOLVENT FOR THE POLYVINYL CHLORIDE PLASTISOL DISPERSION RESIN, AND EVAPORATING SAID SOLVENT FROM THE INKTRANSFER COMPOSITION.
Claim 2
Independent Claim
182 words
A METHOD OF PRODUCING DUPLICATING ARTICLES SUCH AS LONG-LASTING CARBON PAPER AND THE LIKE COMPRISING: APPLYING TO A SURFACE OF A PAPER BACKING MEMBER, CAPABLE OF TRANSMITTING AN IMPRESSION, A COATING COMPOSITION COMPRISING A POLYVINYL CHLORIDE PLASTISOL DISPERSION RESIN AND A LIQUID VEHICLE THEREFOR, SAID LIQUID VEHICLE BEING SUBSTANTIALLY FREE OF VOLATILE INGREDIENTS AND INCLUDING A SUBSTANTIALLY NON-VOLATILE SOLVENT-TYPE PLASTICIZER FOR THE RESIN, SAID PLASTICIZER BEING PRESENT FROM ABOUT 1/2 TO 1 1/2 PARTS BY WEIGHT PER PART OF THE RESIN, HEATING THE COMPOSITION TO THE FUSING TEMPERATURE TO FUSE THE RESIN PARTICLES TO THE BACKOING MEMBER, APPLYING THEREOVER A COATING OF AN INK-TRANSFER COMPOSITION COMPRISING A VINYL CHLORIDE RESIN AND AN ACRYLIC RESIN SELECTED FROM THE GROUP CONSISTING OF POLYMERIZED ACRYLIC AND METHACRYLIC ESTERS OF LOWER ALIPHATIC ALCOHOLS, A VOLATILE SOLVENT FOR SAID RESINS, COLORING MATTER, AND A NONVOLATILE NONDRYING COLOR-CARRIER LIQUID EXPRESSIBLE WHEN SUBJECT OT PRESSURE FROM SAID SYNTHETIC RESIN WHEN IN SOLID FORM AFTER REMOVAL OF THE SOLVENT, SAID SOLVENT BEING SUBSTANTIALLY A NON-SOLVENT FOR THE POLYVINYL CHLORIDE PLASTISOL DISPERSION RESIN, AND EVAPORATING SAID SOLVENT FROM THE INKTRANSFER COMPOSITION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |