US3238047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data processing media
Assignee: Northrop Grumman Guidance and Electronics Co Inc
•
Filing: 1962-08-20
•
Granted: 1966-03-01
•
Expires: 1982-08-20
Abstract
No abstract record available.
Inventors
- 👤 Richard D Murray
- 👤 Berman Elliot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:25
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/02; G03B27/14; G03B27/30; G03B27/306; B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
IN A HEAT SENSITIVE COPY MEDIUM FOR THE REPRODUCTION OF IMAGES IN THERMOGRAPHIC PROCESSES, SAID MEDIUM COMPRISING A SUBSTRATE AND AN IMAGE FORMING COMPOSITION INCLUDING A COMBINATION OF THERMALLY RESPONSIVE CHEMICAL SUBSTANCES, SAID COMPOSITION BEING AN INTEGRAL PART OF SAID MEDIUM SO THAT UPON THE APPLICATION OF HEAT IN A SELECTED PATTERN TO SAID MEDIUM, A VISIBLE IMAGE OF THE COLORED REACTION PRODUCTS OF SAID CHEMICAL SUBSTANCES IS FORMED IN A PATTERN CONFORMING TO THAT APPLIED TO SAID MEDIUM, THE IMPROVEMENT WHEREIN SAID COMBINATION OF THERMALLY RESPONSIVE CHEMICAL SUBSTANCES CONSISTS ESSENTIALLY OF A THERMALLY RESPONSIVE SUBSTNACE COMPRISING COPPER ION, A THERMALLY RESPONSIVE SUBSTANCE COMPRISING FERROUS ION AND A THERMALLY RESPONSIVE SUBSTANCE COMPRISING THIOSLUFATE ION.
Claim 2
Dependent Claim
114 words
IN A HEAT SENSITIVE COPY MEDIUM FOR THE REPRODUCTION OF IMAGES IN THERMOGRAPHIC PROCESSES, SAID MEDIUM COMPRISING A SUBSTRATE AND AN IMAGE FORMING COMPOSITION INCLUDING A COMBINATION OF THERMALLY RESPONSIVE CHEMICAL SUBSTANCES, SAID COMPOSITION BEING AN INTEGRAL PART OF SAID MEDIUM SO THAT UPON THE APPLICATION OF HEAT IN A SELECTED PATTERN TO SAID MEDIUM, A VISIBLE IMAGE OF THE COLORED REACTION PRODUCTS OF SAID CHEMICAL SUBSTANCES IS FORMED IN A PATTERN CONFORMING TO THAT APPLIED TO SAID MEDIUM, THE IMPROVEMENT WHEREIN SAID COMBINATION OF THERMALLY RESPONSIVE CHEMICAL SUBSTANCES CONSISTS ESSENTIALLY OF A THERMALLY RESPONSIVE SUBSTNACE COMPRISING COPPER ION, A THERMALLY RESPONSIVE SUBSTANCE COMPRISING FERROUS ION AND A THERMALLY RESPONSIVE SUBSTANCE COMPRISING THIOSLUFATE ION.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |