Patent US2821455A successfully refreshed from Google Patents.
US2821455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mordanting process and product
Assignee: Technicolor Corp
•
Filing: 1954-08-17
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Granted: 1958-01-28
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Expires: 1974-08-17
Abstract
No abstract record available.
Inventors
- 👤 John P Delangre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:44
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/22; G03C7/25; G03C1/00; G03C1/76; G03C1/825; G03C1/835
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A FILM BLANK FOR MAKING DYE TRANSFER COLOR PRINTS COMPRISING, DISPERSED WITHIN A GELATIN LAYER AS A MORDANTING AGENT, AN INSOLUBLE METAL CHELATE FORMED BY THE REACTION OF COPPER SULFATE AND 4,4''-DIPHENYL METHANE DIBIGUANIDINE DIHYDROCHLORIDE.
Claim 2
Dependent Claim
35 words
A FILM BLANK FOR MAKING DYE TRANSFER COLOR PRINTS COMPRISING, DISPERSED WITHIN A GELATIN LAYER AS A MORDANTING AGENT, AN INSOLUBLE METAL CHELATE FORMED BY THE REACTION OF COPPER SULFATE AND 4,4''-DIPHENYL METHANE DIBIGUANIDINE DIHYDROCHLORIDE.
References Cited (Backward Citations)
US2317184A
Cited
US2572988A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |