US2887469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified polymeric products and methods of making the same
Assignee: Eastman Kodak Co
•
Filing: 1953-11-02
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Granted: 1959-05-19
•
Expires: 1973-11-02
Abstract
No abstract record available.
Inventors
- 👤 Cornelius C Unruh
- 👤 Donald A Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:32
CPC Classifications
C; C08; C08B; C08B15/00; C08B15/05; C08B15/06; C08F; C08F8/00; Y; Y10; Y10S; Y10S528/00; Y10S528/904; Y10S8/00; Y10S8/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
THE METHOD WHICH COMPRISES REACTING A HYDROXYLCONTAINING POLYMER FROM THE GROUP CONSISTING OF HYDROXYLCONTAINING ETHYL CELLULOSE, POLYVINYL ALCOHOL, PARTIALLY ACETYLATED CELLULOSE, ACETATE AND PARTIALLY DEACETYLATED POLYVINYL ACETATE WITH A MONOHALOALKYL ISOCYANATE AND THEREBY FORMING A MONOHALOALKYL URETHANE DERIVATIVE OF SAID POLYMER CHARACTERIZED BY BEING CONVERTIBLE TO A QUATERNARY URETHANE BY QUATERINZATION WITH A TERITARY AMINE.
Claim 2
Independent Claim
55 words
THE METHOD WHICH COMPRISES REACTING A HYDROXYLCONTAINING POLYMER FROM THE GROUP CONSISTING OF HYDROXYLCONTAINING ETHYL CELLULOSE, POLYVINYL ALCOHOL, PARTIALLY ACETYLATED CELLULOSE, ACETATE AND PARTIALLY DEACETYLATED POLYVINYL ACETATE WITH A MONOHALOALKYL ISOCYANATE AND THEREBY FORMING A MONOHALOALKYL URETHANE DERIVATIVE OF SAID POLYMER CHARACTERIZED BY BEING CONVERTIBLE TO A QUATERNARY URETHANE BY QUATERINZATION WITH A TERITARY AMINE.
References Cited (Backward Citations)
FR809233A
Cited
US2125901A
Cited
US2131362A
Cited
US2284895A
Cited
US2335582A
Cited
US2451963A
Cited
US2466404A
Cited
US2428843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |