US2952648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of resinous polyamides by the reaction of a monomeric polyamine with the product of a styrene and a dehydrated castor oil fatty acid
Assignee: Beck Koller and Company England Ltd
•
Filing: 1957-01-10
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Granted: 1960-09-13
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Expires: 1977-01-10
Abstract
No abstract record available.
Inventors
- 👤 Swann Geoffrey
- 👤 Evans Peter Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:50
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A PROCESS OF FORMING A NEW RESINOUS POLYAMIDE WHICH COMPRISES CONDENSING BY HEATING, UNDER REFLUX, A MIXTURE OF (A) A MONOMERIC ORGANIC POLYAMINE WITH (B) A COPOLYMERIZATION PRODUCT PRODUCED BY HEATING, UNDER REFLUX, A CHARGE COMPRISING ESSENTIALLY (1) A MONOMERIC SUBSTANCE SELECTED FROM A GROUP CONSISTING OF STYRENE, ALPHA METHYLSTYRENE AND VINYL TOLUENE AND (2) DEHYDRATED CASTOR OIL FATTY ACIDS, THE CHARGE BEING HEATED TO THE BOILING POINT OF THE MONOMERIC SUBSTANCE, THE MOLAR RANGE OF SUBSTANCE (1) TO DEHYDRATED CASTOR OIL FATTY ACID BEING BETWEEN 2:1 AND 1:2, THE RATIO OF (A) POLYAMINE TO (B) COPOLYMER BEING NOT GREATER THAN MOL OF POLYAMINE PER MOL OF CARBOXY GROUP, AND THE LOWER LIMIT OF POLYAMINE TO ACID BEING THAT QUANTITY CONTAINING ONE EQUIVALENT OF PRIMARY AMINO GROUP PER ONE CARBOXY GROUP IN THE ACID COMPONENT.
Claim 2
Dependent Claim
135 words
A PROCESS OF FORMING A NEW RESINOUS POLYAMIDE WHICH COMPRISES CONDENSING BY HEATING, UNDER REFLUX, A MIXTURE OF (A) A MONOMERIC ORGANIC POLYAMINE WITH (B) A COPOLYMERIZATION PRODUCT PRODUCED BY HEATING, UNDER REFLUX, A CHARGE COMPRISING ESSENTIALLY (1) A MONOMERIC SUBSTANCE SELECTED FROM A GROUP CONSISTING OF STYRENE, ALPHA METHYLSTYRENE AND VINYL TOLUENE AND (2) DEHYDRATED CASTOR OIL FATTY ACIDS, THE CHARGE BEING HEATED TO THE BOILING POINT OF THE MONOMERIC SUBSTANCE, THE MOLAR RANGE OF SUBSTANCE (1) TO DEHYDRATED CASTOR OIL FATTY ACID BEING BETWEEN 2:1 AND 1:2, THE RATIO OF (A) POLYAMINE TO (B) COPOLYMER BEING NOT GREATER THAN MOL OF POLYAMINE PER MOL OF CARBOXY GROUP, AND THE LOWER LIMIT OF POLYAMINE TO ACID BEING THAT QUANTITY CONTAINING ONE EQUIVALENT OF PRIMARY AMINO GROUP PER ONE CARBOXY GROUP IN THE ACID COMPONENT.
References Cited (Backward Citations)
US2648534A
Cited
US2767089A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-13 | 1964-03-14 | 1964-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-13 | 1968-03-14 | 1968-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-13 | 1972-03-14 | 1972-09-13 | $7700.00 | Window Closed / Lapsed |