US3255013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Increasing the sensitivity of photographic emulsions
Assignee: GAF Chemicals Corp
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Filing: 1963-12-27
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Granted: 1966-06-07
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Expires: 1983-12-27
Abstract
No abstract record available.
Inventors
- 👤 Dersch Fritz
- 👤 Sally L Paniccia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:21
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/043
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
42 words
IN A PHOTOGRAPHIC ELEMENT A LIGHT-SENSITIVE SILVER HALIDE EMULSION LAYER HAVING AN INTIMATE CONTACT THEREWITH THE CONDENSATION PRODUCT OF AN ALKYLENE OXIDE HAVING FROM 2 TO 4 CARBON ATOMS WITH 1,4-DIISOBUTYL-1,4-DIMETHYL-BUTYNEDIOL, SAID CONDENSATION PRODUCT HAVING A MOLECULAR WEIGHT OF AT LEAST 300.
Claim 2
Dependent Claim
42 words
IN A PHOTOGRAPHIC ELEMENT A LIGHT-SENSITIVE SILVER HALIDE EMULSION LAYER HAVING AN INTIMATE CONTACT THEREWITH THE CONDENSATION PRODUCT OF AN ALKYLENE OXIDE HAVING FROM 2 TO 4 CARBON ATOMS WITH 1,4-DIISOBUTYL-1,4-DIMETHYL-BUTYNEDIOL, SAID CONDENSATION PRODUCT HAVING A MOLECULAR WEIGHT OF AT LEAST 300.
Claim 3
Dependent Claim
15 words
THE PRODUCT AS DEFINED IN CLAIM 1 WHEREIN THE CONDENSATION PRODUCT HAS THE FOLLOWING 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) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |