US2554017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroresponsive recording blank
Assignee: Timefax Corp
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Filing: 1946-11-14
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Granted: 1951-05-22
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Expires: 1966-11-14
Abstract
No abstract record available.
Inventors
- 👤 Harold R Dalton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:49
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/24; B41M5/245
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
AN ELECTRO-RESPONSIVE, RECORD BANK HAVING A PLIABLE BACKING COMPRISED OF PAPER AND HAVING CARBON FOR RENDERING IT ELECTRICALLY CONDUCTIVE AND IMPARTING A SUBSTANTIALLY BLACKISH COLOR TO AT LEAST ONE SURFACE THEREOF, AND A MASKING COATING FOR OBSCURING SAID SURFACE AND BEING OF A COLOR WHICH IS OF PRONOUNCED CONTRACT WITH THE COLOR OF SAID SURFACE, SAID MASKING COATING BEING SELECTIVELY REMOVABEL IN LOCALIZED AREAS IN RESPONSE TO ELECTRIC SIGNALS APPLIED THERETO, AND COMPRISING A PIGMENT 10% TO 100% OF WHICH IS A METAL ACTIVATED LUMINESCENT PHOSPHOR TO ENABLE THE THICKNESS OF SAID MASKING COATING TO BE INCREASED AS COMPARED WITH A MASKING COATING CONTAINING A SIMILAR NON-LUMINESCENT PIGMENT FOR A GIVEN SENSITIVITY OF RESPONSE TO AN APPLIED ELECTRIC SIGNAL.
Claim 2
Dependent Claim
119 words
AN ELECTRO-RESPONSIVE, RECORD BANK HAVING A PLIABLE BACKING COMPRISED OF PAPER AND HAVING CARBON FOR RENDERING IT ELECTRICALLY CONDUCTIVE AND IMPARTING A SUBSTANTIALLY BLACKISH COLOR TO AT LEAST ONE SURFACE THEREOF, AND A MASKING COATING FOR OBSCURING SAID SURFACE AND BEING OF A COLOR WHICH IS OF PRONOUNCED CONTRACT WITH THE COLOR OF SAID SURFACE, SAID MASKING COATING BEING SELECTIVELY REMOVABEL IN LOCALIZED AREAS IN RESPONSE TO ELECTRIC SIGNALS APPLIED THERETO, AND COMPRISING A PIGMENT 10% TO 100% OF WHICH IS A METAL ACTIVATED LUMINESCENT PHOSPHOR TO ENABLE THE THICKNESS OF SAID MASKING COATING TO BE INCREASED AS COMPARED WITH A MASKING COATING CONTAINING A SIMILAR NON-LUMINESCENT PIGMENT FOR A GIVEN SENSITIVITY OF RESPONSE TO AN APPLIED ELECTRIC SIGNAL.
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) | 1954-05-21 | 1954-11-20 | 1955-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-21 | 1958-11-20 | 1959-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-21 | 1962-11-20 | 1963-05-22 | $7700.00 | Window Closed / Lapsed |