US3645941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing 2-p-dioxanone polymers
Assignee: Eastman Kodak Co
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Filing: 1970-04-01
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Granted: 1972-02-29
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Expires: 1990-04-01
Abstract
Abstract THIS INVENTION RELATES TO A METHOD FOR PREPARING HOMOPOLYMER OF 2-P-DIXOXANONE HAVING MOLECULAR WEIGHTS WITHIN THE RANGE OF FROM ABOUT 2000 TO ABOUT 4000 BY UTILIZING AN ORGANOTIN CATALYST HAVING ONE OF THE GENERAL FORMULAE: (X-)2-SN=O AND (X-)I-SN(-Y)2 IN WHICH THE X''S REPRESENT AN ALKYL, ARYL, ARALKYL, OR AN ACYLOXY RADICAL AND THE Y''S REPRESENT AN ALKYL, ARYL, ARALKYL, ACYLOXY, HALOGEN, OR HYDROXY RADICAL. THESE POLYMERS ARE ESPECIALLY SUITABLE AS SURFACE COATING MATERIALS, E.G. WAXES AND POLISHES.
Inventors
- 👤 Thomas C Snapp
- 👤 Alden E Blood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:25
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C08G63/664
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |