Patent US3007899A successfully refreshed from Google Patents.
US3007899A
Expired / Lapsed
US
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Polyurethane (ester glycol) compositions
Assignee: Union Carbide Corp
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Filing: 1958-07-16
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Granted: 1961-11-07
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Expires: 1978-07-16
Abstract
No abstract record available.
Inventors
- 👤 Urs Subbaraju Venkataramaraj
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:40
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/65; C08G18/66; C08G18/6633; C08G18/6637; C08G18/664
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A METHOD OF PRODUCING POLYMERIC MATERIALS, SUITABLE FOR THE PRODUCTION OF FILMS, WHICH COMPRISES REACTING BY HEATING TOGETHER IN THE PRESENCE OF AN INERT SOLVENT SUBSTANTIALLY EQUIMOLAR AMOUNTS OF A MONOMERIC DIISO COMPOUND CONTAINING TWO GROUPS OF THE FORMULA -N=C=X SEPARATED BY A RADICAL HAVING AT LEAST 4 CARBON ATOMS THEREIN, SAID RADICAL BEING SELECTED FROM THE GROUP CONSISTING OF STRAIGHT CHAIN ALIPHATIC RADICALS, BRANCHED CHAIN ALIPHATIC RADICALS, AND CYCLOALIPHATIC RADICALS, AND WHERE X IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF OXYGEN AND SULFUR, AND OF A GLYCOL MIXTURE CONTAINING A GLYCOL AND A MONOMERIC ESTER GLYCOL, WHEREIN SAID GLYCOL HAS AT LEAST 4 CARBON ATOMS BETWEEN THE HYDROXYL GROUPS AND IS AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF GLYCOLS HAVING THE FORMULA HO-(CH2)NOH WHERE N IS AN INTEGER FROM 4 TO 10, POLYETHER GLYCOLS HAVING THE FORMULA
Claim 2
Independent Claim
143 words
A METHOD OF PRODUCING POLYMERIC MATERIALS, SUITABLE FOR THE PRODUCTION OF FILMS, WHICH COMPRISES REACTING BY HEATING TOGETHER IN THE PRESENCE OF AN INERT SOLVENT SUBSTANTIALLY EQUIMOLAR AMOUNTS OF A MONOMERIC DIISO COMPOUND CONTAINING TWO GROUPS OF THE FORMULA -N=C=X SEPARATED BY A RADICAL HAVING AT LEAST 4 CARBON ATOMS THEREIN, SAID RADICAL BEING SELECTED FROM THE GROUP CONSISTING OF STRAIGHT CHAIN ALIPHATIC RADICALS, BRANCHED CHAIN ALIPHATIC RADICALS, AND CYCLOALIPHATIC RADICALS, AND WHERE X IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF OXYGEN AND SULFUR, AND OF A GLYCOL MIXTURE CONTAINING A GLYCOL AND A MONOMERIC ESTER GLYCOL, WHEREIN SAID GLYCOL HAS AT LEAST 4 CARBON ATOMS BETWEEN THE HYDROXYL GROUPS AND IS AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF GLYCOLS HAVING THE FORMULA HO-(CH2)NOH WHERE N IS AN INTEGER FROM 4 TO 10, POLYETHER GLYCOLS 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) | 1964-11-06 | 1965-05-08 | 1965-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-06 | 1969-05-08 | 1969-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-06 | 1973-05-08 | 1973-11-07 | $7700.00 | Window Closed / Lapsed |