US3846136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Certain activator-toners in photosensitive and thermosensitive elements,compositions and processes
Assignee: Eastman Kodak Co
•
Filing: 1970-05-01
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Granted: 1974-11-05
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Expires: 1990-05-01
Abstract
Abstract 1. IN A PHOTOTHERMOGRAPHIC ELEMENT COMPRISING A SUPPORT, AN OXIDIATION-REDUCTION IMAGE FORMING COMBINATION COMPRISING A SILVER SALT OXIDIZING AGENT WITH A REDUCING AGENT, PHOTOSENSITIVE SILVER SALT, AND BINDER AND AN ACTIVATORTONER AGENT, THE IMPROVEMENT WHEREIN SAID ACTIVATOR-TONER AGENT IS (A) A 2-PYRAZOLIN-5-ONE, (B) A CYCLIC IMIDE OF THE FORMULA Z-N<(-CO-R2-CO-) WHEREIN R2 REPRESENTS ATOMS COMPLETING A SUCCINIMIDO, 4-CYCLOHEXANE-1,2-2-DICARBOXYMIDO, GLUTARIMIDO OR 2,4-THIAZOLIDINEDIONE NUCLEUS, Z IS HYDROGEN, HYDROXY, SILVER MERCURY, POTASSIUM, SODIUM, LITHIUM OR GOLD, OR (C) A QUINAZOLINONE.
Inventors
- 👤 M Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:39
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; G03C1/49836; G03C1/49845; Y; Y10; Y10S; Y10S430/00; Y10S430/166
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
IN A PHOTOTHERMOGRAPHIC ELEMENT COMPRISING A SUPPORT, AN OXIDIATION-REDUCTION IMAGE FORMING COMBINATION COMPRISING A SILVER SALT OXIDIZING AGENT WITH A REDUCING AGENT, PHOTOSENSITIVE SILVER SALT, AND BINDER AND AN ACTIVATORTONER AGENT, THE IMPROVEMENT WHEREIN SAID ACTIVATOR-TONER AGENT IS (A) A 2-PYRAZOLIN-5-ONE, (B) A CYCLIC IMIDE OF THE FORMULA
Claim 2
Dependent Claim
48 words
IN A PHOTOTHERMOGRAPHIC ELEMENT COMPRISING A SUPPORT, AN OXIDIATION-REDUCTION IMAGE FORMING COMBINATION COMPRISING A SILVER SALT OXIDIZING AGENT WITH A REDUCING AGENT, PHOTOSENSITIVE SILVER SALT, AND BINDER AND AN ACTIVATORTONER AGENT, THE IMPROVEMENT WHEREIN SAID ACTIVATOR-TONER AGENT IS (A) A 2-PYRAZOLIN-5-ONE, (B) A CYCLIC IMIDE OF THE FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |