Patent US3580721A successfully refreshed from Google Patents.
US3580721A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-sensitive color-photographic material
Assignee: Konica Minolta Inc
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Filing: 1968-10-22
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Granted: 1971-05-25
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Expires: 1988-10-22
Abstract
Abstract COUPLERS FOR INCLUSION INTO THE SILVER HALIDE EMULSION LAYER OF A COLOR-PHOTOGRAPHIC MATERIAL; SAID COUPLER HAVING THE FORMULA: R-S-CH2-(CH(-CH3))(N-1)-CO-NH-(X)(M-1)-B WHEREIN R IS AN ALIPHATIC HYDROCARBON RESIDUE HAVING 8-18 CARBON ATOMS; B IS A COUPLER RESIDUE; X IS A GROUP BONDING B TO R-S-CH2-(CH(-CH3))(N-1)-CO-NH- AND M AND N ARE 1 OR 2.
Inventors
- 👤 Masakuni Iwama
- 👤 Isaburo Inoue
- 👤 Teruo Hanzawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:18
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/3212; C; C07; C07C; C07C323/00; C07D; C07D231/00; C07D231/02; C07D231/10; C07D231/14; C07D231/44; C07D231/52
Claims Analysis
Total Claims: 0
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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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |