US3213046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulose acetate fibers modified with diisocyanate-polyoxyethylene reaction products
Assignee: Eastman Kodak Co
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Filing: 1961-05-17
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Granted: 1965-10-19
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Expires: 1981-05-17
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert C Harrington
- 👤 James L Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:59
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/34; D06P3/40; D06P3/401; D06P1/00; D06P1/44; D06P1/64; D06P1/642; D06P1/649; D06P1/6492
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
CELLULOSE ORGANIC ACID ESTER FIBERS HAVING DYEING PROPERTIES SUBSTANTIALLY EQUIVALENT TO THAT OF WOOL COM PRISING A LOWER FATTY ACID ESTER OF CELLULOSE HAVING FROM 1 TO 4 CARBON ATOMS AND FROM ABOUT 5% TO 10% BY WEIGHT, BASED ON THE WEIGHT OF THE ESTER OF CELLULOSE, OF THE REACTION PRODUCT DERIVED BY HEATING AN ADMIXTURE OF FROM ABOUT 1 MOLE TO 2 MOLES OF AN ORGANIC DIISOCYANATE AND ABOUT 1 MOLE OF A POLYOXYETHYLENE HAVING AN AVERAGE MOLECULAR WEIGHT OF FROM ABOUT 500 TO 20,000.
Claim 2
Dependent Claim
86 words
CELLULOSE ORGANIC ACID ESTER FIBERS HAVING DYEING PROPERTIES SUBSTANTIALLY EQUIVALENT TO THAT OF WOOL COM PRISING A LOWER FATTY ACID ESTER OF CELLULOSE HAVING FROM 1 TO 4 CARBON ATOMS AND FROM ABOUT 5% TO 10% BY WEIGHT, BASED ON THE WEIGHT OF THE ESTER OF CELLULOSE, OF THE REACTION PRODUCT DERIVED BY HEATING AN ADMIXTURE OF FROM ABOUT 1 MOLE TO 2 MOLES OF AN ORGANIC DIISOCYANATE AND ABOUT 1 MOLE OF A POLYOXYETHYLENE HAVING AN AVERAGE MOLECULAR WEIGHT OF FROM ABOUT 500 TO 20,000.
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) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |