US3342787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resinous compositions
Assignee: Sinclair Research Inc
•
Filing: 1961-08-08
•
Granted: 1967-09-19
•
Expires: 1981-08-08
Abstract
No abstract record available.
Inventors
- 👤 Irving E Muskat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:57
CPC Classifications
C; C08; C08F; C08F22/00; C08F22/04; C08F8/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A METHOD OF ESTERIFYING COPOLYMERS OF MONOVINYL AROMATIC COMPOUND AND MALEIC COMPUND WITH MONOHYDROXY ORGANIC COMPOUND TO PROVIDE AN AT LEAST PARTIALLY ESTERIFIED COPOLYMER, COMPRISING SUBJECTING A MIXTURE OF SAID COPOLYMER AND AT LEAST SUFFICIENT ALCOHOL TO PROVIDE THE DESIRED ESTERIFICATION TO ELEVATED TEMPERATURE IN THE LIQUID PHASE IN THE PRESENCE OF A CATALYTIC AMOUNT OF A METAL FATTY ACID SALT IN WHICH SAID METAL IS SELLECTED FROM THE GROUP CONSISTING OF ALKALI METALS, ZINC AND ALUMINUM.
Claim 2
Independent Claim
77 words
A METHOD OF ESTERIFYING COPOLYMERS OF MONOVINYL AROMATIC COMPOUND AND MALEIC COMPUND WITH MONOHYDROXY ORGANIC COMPOUND TO PROVIDE AN AT LEAST PARTIALLY ESTERIFIED COPOLYMER, COMPRISING SUBJECTING A MIXTURE OF SAID COPOLYMER AND AT LEAST SUFFICIENT ALCOHOL TO PROVIDE THE DESIRED ESTERIFICATION TO ELEVATED TEMPERATURE IN THE LIQUID PHASE IN THE PRESENCE OF A CATALYTIC AMOUNT OF A METAL FATTY ACID SALT IN WHICH SAID METAL IS SELLECTED FROM THE GROUP CONSISTING OF ALKALI METALS, ZINC AND ALUMINUM.
References Cited (Backward Citations)
US2442558A
Cited
US2570861A
Cited
US2607762A
Cited
US2606891A
Cited
US2866771A
Cited
US2806046A
Cited
US2971939A
Cited
US3207718A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |