Patent US2729562A successfully refreshed from Google Patents.
US2729562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing images
Assignee: EIDP Inc
•
Filing: 1954-11-08
•
Granted: 1956-01-03
•
Expires: 1974-11-08
Abstract
No abstract record available.
Inventors
- 👤 Zemp Rene Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:18
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/016; G03F7/021; G03F7/0212; G03F7/0215
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
A PHOTOGRAPHIC ELEMENT COMPRISING A SHEET SUPPORT BEARING A HARDENED WATER-PERMEABLE PROTEIN COLLOID LAYER CONTAINING A LIGHT-SENSITIVE DIAZONIUM SALT OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
23 words
A PHOTOGRAPHIC ELEMENT COMPRISING A SHEET SUPPORT BEARING A HARDENED WATER-PERMEABLE PROTEIN COLLOID LAYER CONTAINING A LIGHT-SENSITIVE DIAZONIUM SALT OF THE GENERAL FORMULA:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |