US2944035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aromatic epoxidized polyester and method of making
Assignee: 3M Co
•
Filing: 1955-07-20
•
Granted: 1960-07-05
•
Expires: 1975-07-20
Abstract
No abstract record available.
Inventors
- 👤 Robert L Wear
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:56
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/62; C08G59/621; C08G59/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
192 words
THE METHOD OF MAKING AN EPOXY POLYESTER RESIN WHICH CAN BE CURED IN ADMIXTURE WITH A POLYFUNCTIONAL CHEMICAL HARDENING AGENT FOR EPOXY POLYETHER RESIN TO A TOUGH RESINOUS STATE, SAID METHOD CONSISTING ESSENTIALLY OF THE STEPS OF (1) BLENDING IN AN ALKALINE MEDIUM (A) A POLYESTER OF POLYHYDRIC ALIPHATIC ALCOHOL AND LONGCHAIN FATTY ACID HAVING, PER AVERAGE MOLECULAR WEIGHT, AT LEAST ABOUT 1.5 OXIRANE GROUPS DIRECTLY AND LATERALLY ATTACHED TO CARBON ATOMS OF THE FATTY ACID RADICALS OF THE POLYESTER AT LEAST EIGHT CARBON ATOMS REMOVED FROM THE ACYL CARBON ATOMS WITH (B) AN AROMATIC COMPOUND HAVING AT LEAST ONE PHENOLIC HYDROXYL RADICAL AND FREE FROM OTHER FUNCTIONAL SUBSTITUENTS, (2) HEATING THE BLEND AT A TEMPERATURE AND FOR A TIME TO CONVERT AT LEAST ABOUT 0.5 OXIRANE GROUPS PER AVERAGE MOLECULAR WEIGHT OF THE POLYESTER TO ARYLOXY AND HYDROXYL RADICALS DIRECTLY AND LATERALLY ATTACHED TO ADJACENT CARBON ATOMS OF THE FATTY ACID RADICALS OF THE POLYESTER WHILE LEAVING AT LEAST ABOUT ONE OXIRANE GROUP PER AVERAGE MOLECULAR WEIGHT AND NOT MORE THAN ABOUT ONE OXIRANE GROUP PER ESTER LINKAGE, AND (3) COOLING THE CONVERTED BLEND AND THEREBY OBTAINING SAID EPOXY POLYESTER RESIN.
Claim 2
Independent Claim
192 words
THE METHOD OF MAKING AN EPOXY POLYESTER RESIN WHICH CAN BE CURED IN ADMIXTURE WITH A POLYFUNCTIONAL CHEMICAL HARDENING AGENT FOR EPOXY POLYETHER RESIN TO A TOUGH RESINOUS STATE, SAID METHOD CONSISTING ESSENTIALLY OF THE STEPS OF (1) BLENDING IN AN ALKALINE MEDIUM (A) A POLYESTER OF POLYHYDRIC ALIPHATIC ALCOHOL AND LONGCHAIN FATTY ACID HAVING, PER AVERAGE MOLECULAR WEIGHT, AT LEAST ABOUT 1.5 OXIRANE GROUPS DIRECTLY AND LATERALLY ATTACHED TO CARBON ATOMS OF THE FATTY ACID RADICALS OF THE POLYESTER AT LEAST EIGHT CARBON ATOMS REMOVED FROM THE ACYL CARBON ATOMS WITH (B) AN AROMATIC COMPOUND HAVING AT LEAST ONE PHENOLIC HYDROXYL RADICAL AND FREE FROM OTHER FUNCTIONAL SUBSTITUENTS, (2) HEATING THE BLEND AT A TEMPERATURE AND FOR A TIME TO CONVERT AT LEAST ABOUT 0.5 OXIRANE GROUPS PER AVERAGE MOLECULAR WEIGHT OF THE POLYESTER TO ARYLOXY AND HYDROXYL RADICALS DIRECTLY AND LATERALLY ATTACHED TO ADJACENT CARBON ATOMS OF THE FATTY ACID RADICALS OF THE POLYESTER WHILE LEAVING AT LEAST ABOUT ONE OXIRANE GROUP PER AVERAGE MOLECULAR WEIGHT AND NOT MORE THAN ABOUT ONE OXIRANE GROUP PER ESTER LINKAGE, AND (3) COOLING THE CONVERTED BLEND AND THEREBY OBTAINING SAID EPOXY POLYESTER RESIN.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |