US2676887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photochemical process and product
Assignee: Individual
•
Filing: 1950-11-03
•
Granted: 1954-04-27
•
Expires: 1970-11-03
Abstract
No abstract record available.
Inventors
- 👤 Chalkley Lyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:25
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/72; G03C1/73; G03C1/732; Y; Y10; Y10S; Y10S204/00; Y10S204/901
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
67 words
A PHOTOSENSITIVE COMPOSITION COMPRISING AN INTIMATE MACROSCOPICALLY HOMOGENEOUS MIXTURE OF AN AMINOTRIPHENYLMETHANE DYE CYANIDE WITH AN ACTIVATOR SELECTED FROM THE GROUP CONSISTING OF VERATROLE, RESORCINOL DIMETHYL ETHER, ETHYLENE GLYCOL ETHERS, PHOSPHORIC ACID ESTER OF A MONOLYDROXY COMPOUND, AROMATIC CARBINOL, AROMATIC AMINE CONTAINING A HYDROGEN ATOM ON THE NITROGEN ATOM, NITRILE IN WHICH THE CYANO GROUP IS ATTACHED TO A CARBON ATOM WHICH ALSO HOLDS A HYDROGEN ATOM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-26 | 1957-10-26 | 1958-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-26 | 1961-10-26 | 1962-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-26 | 1965-10-26 | 1966-04-27 | $7700.00 | Window Closed / Lapsed |