US2528496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive leucocyanide composition
Assignee: Individual
•
Filing: 1946-04-30
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Granted: 1950-11-07
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Expires: 1966-04-30
Abstract
No abstract record available.
Inventors
- 👤 Chalkley Lyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:22
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/72; G03C1/73; G03C1/732
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
PHOTOSENSITIVE MATERIAL COMPRISING A LEUCOCYANIDE OF A TRIARYLMETHANE DYE DISSOLVED IN AT LEAST ONE CARBOXYLIC ACID WHICH TRANSMITS RADIATION OF WAVE LENGTH WITHIN THE RANGE OF ABOUT 2100 ANGSTROM UNITS TO ABOUT 3800 ANGSTROM UNITS, SAID LEUCOCYANIDE WHEN IRRADIATED WITH ULTRA-VIOLET LIGHT WITHIN SAID RANGE AND IN THE PRESENCE OF SAID ACID PRODUCING COLOR WHICH DOES NOT FADE IN THE DARK.
Claim 2
Dependent Claim
61 words
PHOTOSENSITIVE MATERIAL COMPRISING A LEUCOCYANIDE OF A TRIARYLMETHANE DYE DISSOLVED IN AT LEAST ONE CARBOXYLIC ACID WHICH TRANSMITS RADIATION OF WAVE LENGTH WITHIN THE RANGE OF ABOUT 2100 ANGSTROM UNITS TO ABOUT 3800 ANGSTROM UNITS, SAID LEUCOCYANIDE WHEN IRRADIATED WITH ULTRA-VIOLET LIGHT WITHIN SAID RANGE AND IN THE PRESENCE OF SAID ACID PRODUCING COLOR WHICH DOES NOT FADE IN THE DARK.
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) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |