US3284204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic films and process of making same
Assignee: EIDP Inc
•
Filing: 1964-02-05
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Granted: 1966-11-08
•
Expires: 1984-02-05
Abstract
No abstract record available.
Inventors
- 👤 Lillin Heinrich Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:37
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/91; G03C1/93
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A PHOTOGRAPHIC ELEMENT COMPRISING, IN ORDER, (A) A HYDROPHOBIC POLYMER FILM BASE, (B) A SUBSTRATUM COMPRISING A MIXTURE OF GELATIN, DIALDEHYDE STARCH AND AN ALKYLENE GLYCOL ESTER OF POLYMANNURONIC ACID, SAID ALKYLENE GROUP CONTAINING 2-5 CARBON ATOMS, AND (C) A WATER-PERMEABLE MARCROMOLECULAR COLLOID LAYER ON SAID SUBSTRATUM.
Claim 2
Dependent Claim
47 words
A PHOTOGRAPHIC ELEMENT COMPRISING, IN ORDER, (A) A HYDROPHOBIC POLYMER FILM BASE, (B) A SUBSTRATUM COMPRISING A MIXTURE OF GELATIN, DIALDEHYDE STARCH AND AN ALKYLENE GLYCOL ESTER OF POLYMANNURONIC ACID, SAID ALKYLENE GROUP CONTAINING 2-5 CARBON ATOMS, AND (C) A WATER-PERMEABLE MARCROMOLECULAR COLLOID LAYER ON SAID SUBSTRATUM.
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) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |