US3026293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylamidic graft copolymers and their preparation
Assignee: Eastman Kodak Co
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Filing: 1959-08-06
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Granted: 1962-03-20
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Expires: 1979-08-06
Abstract
No abstract record available.
Inventors
- 👤 John R Caldwell
- 👤 Jr Harry W Coover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:26
CPC Classifications
C; C08; C08F; C08F265/00; C08F265/10; Y; Y10; Y10S; Y10S8/00; Y10S8/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
POLYMERIC MATERIAL CAPABLE OF FREELY TRANSMITTING WATER VAPOR WHILE PREVENTING THE PASSAGE OF LIQUID WATER AND BEING THE GRAFT COPOLYMER OF A MIXTURE OF (1) A HOMOPOLYMER OF A MONOMER OF THE FORMULA:
Claim 2
Dependent Claim
33 words
POLYMERIC MATERIAL CAPABLE OF FREELY TRANSMITTING WATER VAPOR WHILE PREVENTING THE PASSAGE OF LIQUID WATER AND BEING THE GRAFT COPOLYMER OF A MIXTURE OF (1) A HOMOPOLYMER OF A MONOMER OF 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) | 1965-03-19 | 1965-09-18 | 1966-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-19 | 1969-09-18 | 1970-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-19 | 1973-09-18 | 1974-03-20 | $7700.00 | Window Closed / Lapsed |