Patent US2776252A successfully refreshed from Google Patents.
US2776252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry electrical recording medium
Assignee: Faximile Inc
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Filing: 1953-04-23
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Granted: 1957-01-01
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Expires: 1973-04-23
Abstract
No abstract record available.
Inventors
- 👤 Robert S Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:18
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/20; B41M5/205
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A DRY, WHITE RECORDING MEDIUM MARKABLE ELECTROLYTICALLY ONLY WHEN HEATED, COMPRISING A SINGLE LAYER OF DRY POROUS MATERIAL IMPREGNATED ESSENTIALLY WITH AT LEAST ONE AMIDE HAVING AT LEAST FOUR CARBON ATOMS AND SELECTED FROM THE GROUP CONSISTING OF ACETANILIDE, BENZAMIDE, PARA TOLUENE SULFONAMIDE, N-ETHYL BENZENE SULFONAMIDE, AND BUTYRAMIDE, A HIGHLY IONIZABLE SALT, AND AN ELECTRO-RE SPONSIVE SUBSTANTIALLY COLORLESS MARKING COMPOUND.
Claim 2
Dependent Claim
60 words
A DRY, WHITE RECORDING MEDIUM MARKABLE ELECTROLYTICALLY ONLY WHEN HEATED, COMPRISING A SINGLE LAYER OF DRY POROUS MATERIAL IMPREGNATED ESSENTIALLY WITH AT LEAST ONE AMIDE HAVING AT LEAST FOUR CARBON ATOMS AND SELECTED FROM THE GROUP CONSISTING OF ACETANILIDE, BENZAMIDE, PARA TOLUENE SULFONAMIDE, N-ETHYL BENZENE SULFONAMIDE, AND BUTYRAMIDE, A HIGHLY IONIZABLE SALT, AND AN ELECTRO-RE SPONSIVE SUBSTANTIALLY COLORLESS MARKING COMPOUND.
References Cited (Backward Citations)
US1922463A
Cited
US2316340A
Cited
US2419296A
Cited
US2442596A
Cited
GB630146A
Cited
US2530956A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-01 | 1960-07-02 | 1961-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-01 | 1964-07-02 | 1965-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-01 | 1968-07-02 | 1969-01-01 | $7700.00 | Window Closed / Lapsed |