Patent US2933463A successfully refreshed from Google Patents.
US2933463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction product of dextran-modified polyester with organic diisocyanate and method of producing same
Assignee: Commonwealth Engineering Company of Ohio
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Filing: 1955-03-15
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Granted: 1960-04-19
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Expires: 1975-03-15
Abstract
No abstract record available.
Inventors
- 👤 Leo J Novak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:28
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/68
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A RESINOUS COMPOSITION PREPARED BY HEATING AND REACTING A MIXTURE IN PARTS BY WEIGHT OF (1) A DEXTRANMODIFIED RESIN PRODUCED BY HEATING A MIXTURE CONSISTING OF 30% TO 75% OF A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF UNSATURATED POLYCARBOXYLIC ACIDS AND THEIR ACIDS ANHYDRIDES, 15% TO 60% OF A MONOMERIC POLYHYDRIC ALCOHOL AND 5% TO 25% OF DEXTRAN TO A TEMPERATURE OF ABOUT 300*C., AND (2) TO THE RESULTANT MASS INTRODUCING AND REACTING THEREWITH 0.5 TO 1.5 MOLS OF AN ORGANIC DIISDOCYANATE PER MOL OF SAID DEXTRAN-MODIFIED RESIN.
Claim 2
Dependent Claim
89 words
A RESINOUS COMPOSITION PREPARED BY HEATING AND REACTING A MIXTURE IN PARTS BY WEIGHT OF (1) A DEXTRANMODIFIED RESIN PRODUCED BY HEATING A MIXTURE CONSISTING OF 30% TO 75% OF A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF UNSATURATED POLYCARBOXYLIC ACIDS AND THEIR ACIDS ANHYDRIDES, 15% TO 60% OF A MONOMERIC POLYHYDRIC ALCOHOL AND 5% TO 25% OF DEXTRAN TO A TEMPERATURE OF ABOUT 300*C., AND (2) TO THE RESULTANT MASS INTRODUCING AND REACTING THEREWITH 0.5 TO 1.5 MOLS OF AN ORGANIC DIISDOCYANATE PER MOL OF SAID DEXTRAN-MODIFIED RESIN.
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) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |