US2996481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of methacrolein
Assignee: EIDP Inc
•
Filing: 1958-01-24
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Granted: 1961-08-15
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Expires: 1978-01-24
Abstract
No abstract record available.
Inventors
- 👤 Eifert Robert Lee
- 👤 Marks Barnard Mitchel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:24
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/18; C08F; C08F20/00; C08F20/62; C08F216/00; C08F216/34; C08F22/00; C08F220/00; C08F220/02; C08F220/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A COPOLYMER OF MONOMERS CONSISTING ESSENTIALLY OF METHACROLEIN AND A COMONOMER OF THE CLASS CONSISTING OF ALKYL ESTERS OF ACRYLIC ACID, FUMARIC ACID AND MALEIC ACID, WHEREIN THE ESTER RADICAL CONTAINS FROM 1 TO 5 CARBON ATOMS, SAID COPOLYMER CONTAINING FROM 1 TO 25 WEIGHT PERCENT OF SAID COMONOMER AND HAVING AN INHERENT VISCOSITY, AS DETERMINED ON A 0.5 PERCENT SOLUTION IN PYRIDINE AT 35*C., OF 0.3 TO 3.0.
Claim 2
Dependent Claim
69 words
A COPOLYMER OF MONOMERS CONSISTING ESSENTIALLY OF METHACROLEIN AND A COMONOMER OF THE CLASS CONSISTING OF ALKYL ESTERS OF ACRYLIC ACID, FUMARIC ACID AND MALEIC ACID, WHEREIN THE ESTER RADICAL CONTAINS FROM 1 TO 5 CARBON ATOMS, SAID COPOLYMER CONTAINING FROM 1 TO 25 WEIGHT PERCENT OF SAID COMONOMER AND HAVING AN INHERENT VISCOSITY, AS DETERMINED ON A 0.5 PERCENT SOLUTION IN PYRIDINE AT 35*C., OF 0.3 TO 3.0.
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) | 1964-08-14 | 1965-02-13 | 1965-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-14 | 1969-02-13 | 1969-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-14 | 1973-02-13 | 1973-08-15 | $7700.00 | Window Closed / Lapsed |