US3859254A
Expired / Lapsed
US
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Film forming polymeric compositions of 7,7-dimethyl-7h-dibenzo (c,h)xanthene compounds
Assignee: Eastman Kodak Co
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Filing: 1974-03-18
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Granted: 1975-01-07
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Expires: 1994-03-18
Abstract
Abstract Novel monomers of 7,7-dimethyl-7H-dibenzo(c,h)xanthene-5,9disulfonyl halide and novel high molecular weight polymers containing 7,7-dimethyl-7H-dibenzo-(c,h)xanthene residues are useful in the preparation of photographic film bases.
Inventors
- 👤 Frederick L Hamb
- 👤 John C Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:18
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/30; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/19; C08G63/193; C08G63/66; C08G63/668; C08G63/672; C08G75/24; G; G03; G03C; G03C1/00; G03C1/76; G03C1/795
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
19 words
A FILM FORMING POLYMER HAVING A GLASS TRANSITION TEMPERATURE GREATER THAN 200*C COMPRISING RECURRING UNITS HAVING THE FORMULA 1:
Claim 2
Dependent Claim
19 words
A FILM FORMING POLYMER HAVING A GLASS TRANSITION TEMPERATURE GREATER THAN 200*C COMPRISING RECURRING UNITS HAVING THE FORMULA 1:
Claim 3
Dependent Claim
10 words
A film of a polymer as defined by claim 1.
Claim 4
Dependent Claim
10 words
A polymer according to claim 1 wherein X is SO2.
Claim 5
Dependent Claim
10 words
A polymer according to claim 1 wherein X is O.
Claim 6
Dependent Claim
9 words
A polymer according to claim 1 wherein X is
Claim 7
Dependent Claim
18 words
A film forming polymer having a glass transition temperature greater than 200*C. comprising recurring units having the formula:
Claim 8
Dependent Claim
18 words
A film forming polymer having a glass transition temperature greater than 200*C. comprising recurring units having the formula:
Claim 9
Dependent Claim
18 words
A film forming polymer having a glass transition temperature greater than 200*C. comprising recurring units having the formula:
Claim 10
Dependent Claim
18 words
A film forming polymer having a glass transition temperature greater than 200*C. comprising recurring units having the formula:
Claim 11
Dependent Claim
18 words
A film forming polymer having a glass transition temperature greater than 200*C. comprising recurring units having the formula:
Claim 12
Dependent Claim
18 words
A film forming polymer having a glass transition temperature greater than 200*C. comprising recurring units having the formula:
Claim 13
Dependent Claim
18 words
A film forming polymer having a glass transition temperature greater than 200*C. comprising recurring units having the formula:
Claim 14
Dependent Claim
18 words
A film forming polymer having a glass transition temperature greater than 200*C. comprising recurring units having the formula:
Claim 15
Dependent Claim
18 words
A film forming polymer having a glass transition temperature greater than 200*C. comprising recurring units having the formula:
Claim 16
Dependent Claim
18 words
A film forming polymer having a glass transition temperature greater than 200*C. comprising recurring units having the formula:
Claim 17
Dependent Claim
15 words
A film forming polymer according to claim 1 wherein R3 is presented by the fomula:
Claim 18
Dependent Claim
16 words
A film forming linear polymer having a glass transition temperature greater than 200*C. having the formula:
Claim 19
Dependent Claim
16 words
A film forming linear polymer having a glass transition temperature greater than 200*C. having the formula:
Claim 20
Dependent Claim
16 words
A film forming linear polymer having a glass transition temperature greater than 200*C. having the formula:
Claim 21
Dependent Claim
16 words
A film forming linear polymer having a glass transition temperature greater than 200*C. having the formula:
Claim 22
Dependent Claim
16 words
A film forming linear polymer having a glass transition temperature greater than 200*C. having the formula:
Claim 23
Dependent Claim
16 words
A film forming linear polymer having a glass transition temperature greater than 200*C. having the 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) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |