Patent US2591590A successfully refreshed from Google Patents.
US2591590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antistatic photographic film
Assignee: GAF Chemicals Corp
•
Filing: 1945-12-22
•
Granted: 1952-04-01
•
Expires: 1965-12-22
Abstract
No abstract record available.
Inventors
- 👤 Fritz W H Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:11
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/85; Y; Y10; Y10S; Y10S260/00; Y10S260/15; Y10S260/19
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
25 words
A PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT CARRYING A PHOTOGRAPHIC EMULSION LAYER AND AN ANTI-STATIC LAYER COMPRISING A BIGUANIDE SALT CORRESPONDING TO THE FOLLOWING GENERAL FORMULA:
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) | 1955-04-01 | 1955-10-01 | 1956-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-01 | 1959-10-01 | 1960-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-01 | 1963-10-01 | 1964-04-01 | $7700.00 | Window Closed / Lapsed |