US3689391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for chemically initiating photochemical reactions
Assignee: Synvar Associates
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Filing: 1970-05-13
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Granted: 1972-09-05
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Expires: 1990-05-13
Abstract
Abstract THE INDUCEMENT OF PHOTOCHEMICAL REACTIONS IN THE ABSENCE OF AN EXTERNAL LIGHT SOURCE THROUGH UTILIZATION OF A CHEMICAL REACTION THAT YIELDS AT LEAST ONE PRODUCT WHICH, IN ITS ELECTRONICALLY EXCITED STATE, EITHER PRODUCES LIGHT EMISSION OR EXHIBITS A SUFFICIENTLY LONG-LIVED EXCITED STATE SO AS TO PERMIT DIRECT ENERGY TRANSFER TO A COMPOUND CAPABLE OF UNDERGOING THE PHOTOCHEMICAL REACTION. THE AMOUNT OF ENERGY TRANSFERRED MUST BE SUFFICIENT TO INTIATE THE REACTION. BOTH CHEMILUMINESCENT REACTIONS AND ELECTROCHEMILUMINESCENT REACTIONS CAN BE EMPLOYED TO INDUCE THE PHOTOCHEMICAL REACTION.
Inventors
- 👤 Edwin F Ullman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:01
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/77; C07D307/78; C07D307/79; B; B01; B01J; B01J19/00; B01J19/08; C07C; C07C5/00; C07C5/22; C07C5/27; C07C5/29; C07D219/00; C07D219/02; C07D319/00; C07D319/10; C07D319/14; C07D471/00; C07D471/02; C07D471/04; C07C2602/00; C07C2602/02; C07C2602/14; C07C2602/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |