Patent US2829052A successfully refreshed from Google Patents.
US2829052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive system
Assignee: Individual
•
Filing: 1955-11-16
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Granted: 1958-04-01
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Expires: 1975-11-16
Abstract
No abstract record available.
Inventors
- 👤 Chalkley Lyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:47
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/72; G03C1/73; G03C1/732; Y; Y10; Y10S; Y10S204/00; Y10S204/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
A SOLID COMPOSITION PHOTOSENSITIVE ONLY TO ULTRAVIOLET AND SHORTER WAVE LENGTHS, CONSISTING OF A COMBINATION OF A COLLAGENOUS PROTEIN AND A TRIPRIMARYAMINO-TRIPHENYLACETONITRILE.
Claim 2
Dependent Claim
22 words
A SOLID COMPOSITION PHOTOSENSITIVE ONLY TO ULTRAVIOLET AND SHORTER WAVE LENGTHS, CONSISTING OF A COMBINATION OF A COLLAGENOUS PROTEIN AND A TRIPRIMARYAMINO-TRIPHENYLACETONITRILE.
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) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |