US3413138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermosensitive copy sheet
Assignee: Interchemical Corp
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Filing: 1965-10-13
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Granted: 1968-11-26
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Expires: 1985-10-13
Abstract
No abstract record available.
Inventors
- 👤 Georgalas Nick
- 👤 Franco Guy J Del
- 👤 Adhikary Pashu
- 👤 Loewrigkeit Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:25
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/337; B41M5/3375; B41M5/323; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31899
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A HEAT-SENSITIVE COPYING SHEET ADAPTED, ON BEING PLACED IN HEAT-CONDUCTED RELATIONSHIP WITH A GRAPHIC ORIGINAL HAVING GRAPHIC REPRESENTATIONS HIGHLY ABSORPTIVE OF INFRARED RAYS AND ON IRRADIATION OF SAID GRAPHIC ORIGINAL WITH INFRARED RAYS, TO PRODUCE A COPY OF SAID GRAPHIC ORIGINAL, SAID COPYING SHEET COMPRISING A BASE SHEET HAVING THEREON (1) A FIRST COATING COMPRISING A COPOLYMER COMPRISING THE ADDITION POLYMERIZATION PRODUCT OF AN ALPHA-BETA UNSATURATED CARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ACID, METHACRYLIC ACID, FUMARIC ACID AND MALEIC ACID AND AT LEAST ONE OTHER ETHYLENICALLY UNSATURATED MONOMER AND (2) A TOP COATING COMPRISING A FILM-FORMING BINDER AND A HETEROCYCLIC DERIVATIVE OF BIS(P-DIALKYLAMINOARYL)METHANE HAVING THE FORMULA
Claim 2
Dependent Claim
109 words
A HEAT-SENSITIVE COPYING SHEET ADAPTED, ON BEING PLACED IN HEAT-CONDUCTED RELATIONSHIP WITH A GRAPHIC ORIGINAL HAVING GRAPHIC REPRESENTATIONS HIGHLY ABSORPTIVE OF INFRARED RAYS AND ON IRRADIATION OF SAID GRAPHIC ORIGINAL WITH INFRARED RAYS, TO PRODUCE A COPY OF SAID GRAPHIC ORIGINAL, SAID COPYING SHEET COMPRISING A BASE SHEET HAVING THEREON (1) A FIRST COATING COMPRISING A COPOLYMER COMPRISING THE ADDITION POLYMERIZATION PRODUCT OF AN ALPHA-BETA UNSATURATED CARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ACID, METHACRYLIC ACID, FUMARIC ACID AND MALEIC ACID AND AT LEAST ONE OTHER ETHYLENICALLY UNSATURATED MONOMER AND (2) A TOP COATING COMPRISING A FILM-FORMING BINDER AND A HETEROCYCLIC DERIVATIVE OF BIS(P-DIALKYLAMINOARYL)METHANE HAVING THE FORMULA
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) | 1971-11-26 | 1972-05-27 | 1972-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-26 | 1976-05-27 | 1976-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-26 | 1980-05-27 | 1980-11-26 | $7700.00 | Window Closed / Lapsed |