US2709134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photo-sensitive ionic crystal mixture
Assignee: Individual
•
Filing: 1952-05-21
•
Granted: 1955-05-24
•
Expires: 1972-05-21
Abstract
No abstract record available.
Inventors
- 👤 Jacobs Harold
- 👤 Dobischek Dietrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:09
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/49; Y; Y10; Y10S; Y10S430/00; Y10S430/163
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
SOLID STATE IONIC CRYSTAL POWDERED MIXTURE COMPRISING 95 TO 90% FINELY GROUND ALKALI HALIDES AND 5 TO 10% SILVER HALIDES, SAID SOLID STATE POWDERED MIXTURE DARKENING UNDER INTENSE LIGHT AND SAID DARKEND MIXTURE BLEACHING WARMING.
Claim 2
Dependent Claim
35 words
SOLID STATE IONIC CRYSTAL POWDERED MIXTURE COMPRISING 95 TO 90% FINELY GROUND ALKALI HALIDES AND 5 TO 10% SILVER HALIDES, SAID SOLID STATE POWDERED MIXTURE DARKENING UNDER INTENSE LIGHT AND SAID DARKEND MIXTURE BLEACHING WARMING.
References Cited (Backward Citations)
US2401051A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-23 | 1958-11-22 | 1959-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-23 | 1962-11-22 | 1963-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-23 | 1966-11-22 | 1967-05-24 | $7700.00 | Window Closed / Lapsed |