Patent US2649439A successfully refreshed from Google Patents.
US2649439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of plastic condensable alkyl acrylate polymers and subsequent elasto-condensation thereof
Assignee: Goodrich Corp
•
Filing: 1950-11-24
•
Granted: 1953-08-18
•
Expires: 1970-11-24
Abstract
No abstract record available.
Inventors
- 👤 Harold P Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:43
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
THE METHOD WHICH COMPRISES PREPARING A MIXTURE OF (1) A PLASTIC POLYMER DERIVED FROM A MONOMERIC MIXTURE COMPRISING A MAJOR PROPORTION OF AN ALKYL ESTER OF ACRYLIC ACID CONTAINING FROM 1 TO 1I CARBON ATOMS IN THE ALKYL GROUP REACTED FIRST WITH AN ALKALINE HYDROLYZING AGENT AND THEN WITH A STRONG ACID SO AS TO INTRODUCE INTO SAID POLYMERIC ACRYLIC ESTER FROM 0.01 TO 0.30 CHEMICAL EQUIVALENT BY WEIGHT OF COMBINED (-COOH) PER 100 PARTS BY WEIGHT OF COMBINED AND (2) AN AMOUNT OF A POLYVALENT METAL OXIDE AT LEAST EQUIVALENT CHEMICALLY TO ONE-HALF SAID POLYMERIC COMBINED (-COOH), AND HEATING THE RESULTANT PLASTIC COMPOSITION AT A TEMPERATURE OF FROM 125 TO 400* F. UNTIL SAID PLASTIC COMPOSITION HAS BEEN CONVERTED TO AN ESSENTIALLY ELASTIC POLYMERIC METALLO-CARBOXYLATE.
Claim 2
Independent Claim
126 words
THE METHOD WHICH COMPRISES PREPARING A MIXTURE OF (1) A PLASTIC POLYMER DERIVED FROM A MONOMERIC MIXTURE COMPRISING A MAJOR PROPORTION OF AN ALKYL ESTER OF ACRYLIC ACID CONTAINING FROM 1 TO 1I CARBON ATOMS IN THE ALKYL GROUP REACTED FIRST WITH AN ALKALINE HYDROLYZING AGENT AND THEN WITH A STRONG ACID SO AS TO INTRODUCE INTO SAID POLYMERIC ACRYLIC ESTER FROM 0.01 TO 0.30 CHEMICAL EQUIVALENT BY WEIGHT OF COMBINED (-COOH) PER 100 PARTS BY WEIGHT OF COMBINED AND (2) AN AMOUNT OF A POLYVALENT METAL OXIDE AT LEAST EQUIVALENT CHEMICALLY TO ONE-HALF SAID POLYMERIC COMBINED (-COOH), AND HEATING THE RESULTANT PLASTIC COMPOSITION AT A TEMPERATURE OF FROM 125 TO 400* F. UNTIL SAID PLASTIC COMPOSITION HAS BEEN CONVERTED TO AN ESSENTIALLY ELASTIC POLYMERIC METALLO-CARBOXYLATE.
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) | 1956-08-17 | 1957-02-16 | 1957-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-17 | 1961-02-16 | 1961-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-17 | 1965-02-16 | 1965-08-18 | $7700.00 | Window Closed / Lapsed |