Patent US2626524A successfully refreshed from Google Patents.
Patent US3827889A successfully refreshed from Google Patents.
US3827889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally developable light sensitive material
Assignee: Fujifilm Holdings Corp
•
Filing: 1971-10-08
•
Granted: 1974-08-06
•
Expires: 1991-10-08
Abstract
Abstract IN A THERMALLY DEVELOPABLE LIGHT-SENSITIVE PAPER COMPOSED OF A SILVER SALT OF BENZOTRIAZOLE, A LIGHT-SENSITIVE SILVER HALIDE, A REDUCING AGENT, SUCH AS, HYDROQUINONE AND AN ORGANIC ACID, SUCH AS, AN ALIPHATIC MONOCARBOXYLIC ACID, THE PRESERVABILITY OF IMAGES CAN BE IMPROVED BY USING 1-ASCRONIC ACID, ITS ESTERS, FUROIN, BENZOIN DIHYDROXY ACETONE, ETC., AS A REDUCING AGENT. ACCORDING TO THE PAPER USED, A NEGATIVE AND A POSITIVE COPY CAN BE OBTAINED FROM THE SAME MATERIAL.
Inventors
- 👤 K Ohkubo
- 👤 T Masuda
- 👤 J Noguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:04
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |