US2638422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telefacsimile recording and duplicating paper and method of making same
Assignee: Timefax Corp
•
Filing: 1951-02-10
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Granted: 1953-05-12
•
Expires: 1971-02-10
Abstract
No abstract record available.
Inventors
- 👤 Austin G Cooley
- 👤 Harold R Dalton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:30
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/24; B41M5/245; B41M5/025; B41M5/04; Y; Y10; Y10S; Y10S101/00; Y10S101/29; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31725; Y10T428/31768; Y10T428/31772; Y10T428/31775
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
THE METHOD OF MAKING A RECORDING AND DUPLICATING BLANK WHICH IS SPECIALLY ADAPTED TO RECORD ELECTRIC SIGNAL VOLTAGES STYLUS-APPLIED THERETO, WHICH COMPRISES MIXING TRANSFERABLE DYE WITH ELECTRICALLY CONDUCTIVE CARBON WITH A WATER SOLUBLE BINDER AND WITH WATER, APPLYING SAID MIXTURE TO THE SURFACE OF A BACKING TO FORM A DUPLICATING COAT OF PREDETERMINED ELECTRIC CONDUCTIVITY, DRYING THE SAID MIXTURE ON SAID BACKING, MIXING A PIGMENT WITH A BINDER SOLUBLE IN AN ORGANIC SOLVENT AND WITH SUCH ORGANIC SOLVENT IN WHICH SAID DYE AND THE FIRST-MENTIONED BINDER ARE INSOLUBLE, APPLYING THE SECOND-MENTIONED MIXTURE OVER THE FIRST-MENTIONED MIXTURE WITH A THINNESS MERELY SUFFICIENT TO MASK THE COLOR OF SAID DYE AND OF SAID CARBON, AND THEN DRYING SAID SECOND MIXTURE TO FORM A NON-TACKY HOMOGENEOUS AND PIGMENT-BONDED MASKING COAT OVER THE FIRST MIXTURE WHICH MASKING COAT IS LOCALLY REMOVABLE IN ELEMENTAL AREAS IN RESPONSE TO ELECTRIC DISCHARGE PRODUCED BY SAID STYLUS-APPLIED ELECTRIC SIGNAL VOLTAGES.
Claim 2
Independent Claim
152 words
THE METHOD OF MAKING A RECORDING AND DUPLICATING BLANK WHICH IS SPECIALLY ADAPTED TO RECORD ELECTRIC SIGNAL VOLTAGES STYLUS-APPLIED THERETO, WHICH COMPRISES MIXING TRANSFERABLE DYE WITH ELECTRICALLY CONDUCTIVE CARBON WITH A WATER SOLUBLE BINDER AND WITH WATER, APPLYING SAID MIXTURE TO THE SURFACE OF A BACKING TO FORM A DUPLICATING COAT OF PREDETERMINED ELECTRIC CONDUCTIVITY, DRYING THE SAID MIXTURE ON SAID BACKING, MIXING A PIGMENT WITH A BINDER SOLUBLE IN AN ORGANIC SOLVENT AND WITH SUCH ORGANIC SOLVENT IN WHICH SAID DYE AND THE FIRST-MENTIONED BINDER ARE INSOLUBLE, APPLYING THE SECOND-MENTIONED MIXTURE OVER THE FIRST-MENTIONED MIXTURE WITH A THINNESS MERELY SUFFICIENT TO MASK THE COLOR OF SAID DYE AND OF SAID CARBON, AND THEN DRYING SAID SECOND MIXTURE TO FORM A NON-TACKY HOMOGENEOUS AND PIGMENT-BONDED MASKING COAT OVER THE FIRST MIXTURE WHICH MASKING COAT IS LOCALLY REMOVABLE IN ELEMENTAL AREAS IN RESPONSE TO ELECTRIC DISCHARGE PRODUCED BY SAID STYLUS-APPLIED ELECTRIC SIGNAL VOLTAGES.
References Cited (Backward Citations)
US2188590A
Cited
US2294150A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-11 | 1956-11-10 | 1957-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-11 | 1960-11-10 | 1961-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-11 | 1964-11-10 | 1965-05-12 | $7700.00 | Window Closed / Lapsed |