US2963453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylic and methacrylic acid resins controllably crosslinked with polyallyl acrylate, its substituted derivatives, and copolymers thereof
Assignee: Rohm and Haas Co
•
Filing: 1957-03-15
•
Granted: 1960-12-06
•
Expires: 1977-03-15
Abstract
No abstract record available.
Inventors
- 👤 Jesse C H Hwa
- 👤 Orville H Loeffler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:22
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/62; C08F20/02; C08F20/10; C08F20/12; C08F265/00; C08F265/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
AN ION-EXCHANGE RESIN COMPRISING AN INSOLUBLE, CROSS LINKED COPOLYMER OF (A) A MEMBER OF THE CLASS CONSISTING OF ACRYLIC AND METHACRYLIC ACIDS, AND (B) A LINEAR AND SOLUBLE CROSSLINKING AGENT CONSISTING OF A HOMOPOLYMER OF THE CLASS CONSISTING OF POLY(ALLYL ACRYLATE), POLY(METHALLYL ACRYLATE). POLY(ALLYL METHACETLATE), AND POLY(METHALLYL METHACRYLATE), SAID CROSSLINKING AGENT HAVING BEEN PREPARE BY ANIONIC POLYMERIZATION OF THE ACRYLATE AND METHACRYLATE MONOMER UNITS ONLY, LEAVING THE ALLYL SIDECHAINS SUBSTANTIALLY INTACT AND THEREFORE AVAILABLE. UNDER CONDITIONS OF FREE RADICAL POLYMERIZATION, FOR THE SUBSEQUENT CROSSLINKING REACTION WITH SAID MEMBER OF THE CLASS CONSISTING OF ACRYLIC AND METHACRYLIC ACIDS, THE CROSSLINKING AGENT BEING PRESENT IN AN AMOUNT VARYING FROM 0.1 TO 5.0 PERCENT OF THE TOTAL POLYMERIZABLE MATERIALS ON A MOLAR BASIS AND HAVING A MOLECULAR WEIGHT OF AT LEAST 20,000.
Claim 2
Dependent Claim
129 words
AN ION-EXCHANGE RESIN COMPRISING AN INSOLUBLE, CROSS LINKED COPOLYMER OF (A) A MEMBER OF THE CLASS CONSISTING OF ACRYLIC AND METHACRYLIC ACIDS, AND (B) A LINEAR AND SOLUBLE CROSSLINKING AGENT CONSISTING OF A HOMOPOLYMER OF THE CLASS CONSISTING OF POLY(ALLYL ACRYLATE), POLY(METHALLYL ACRYLATE). POLY(ALLYL METHACETLATE), AND POLY(METHALLYL METHACRYLATE), SAID CROSSLINKING AGENT HAVING BEEN PREPARE BY ANIONIC POLYMERIZATION OF THE ACRYLATE AND METHACRYLATE MONOMER UNITS ONLY, LEAVING THE ALLYL SIDECHAINS SUBSTANTIALLY INTACT AND THEREFORE AVAILABLE. UNDER CONDITIONS OF FREE RADICAL POLYMERIZATION, FOR THE SUBSEQUENT CROSSLINKING REACTION WITH SAID MEMBER OF THE CLASS CONSISTING OF ACRYLIC AND METHACRYLIC ACIDS, THE CROSSLINKING AGENT BEING PRESENT IN AN AMOUNT VARYING FROM 0.1 TO 5.0 PERCENT OF THE TOTAL POLYMERIZABLE MATERIALS ON A MOLAR BASIS AND HAVING A MOLECULAR WEIGHT OF AT LEAST 20,000.
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) | 1963-12-06 | 1964-06-06 | 1964-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-06 | 1968-06-06 | 1968-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-06 | 1972-06-06 | 1972-12-06 | $7700.00 | Window Closed / Lapsed |