US2993878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of methacrolein
Assignee: EIDP Inc
•
Filing: 1956-10-01
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Granted: 1961-07-25
•
Expires: 1976-10-01
Abstract
No abstract record available.
Inventors
- 👤 Marks Barnard Mitchel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:02
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/06; C08G2/14; F; F02; F02B; F02B33/00; F02M; F02M2700/00; F02M2700/33; F02M2700/331; F02M2700/335
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
A NORMALLY SOLID, ADDITION HOMOPOLYMER OF METHACROLEIN HAVING AN INHERENT VISCOSITY IN DIMETHYLFORMAMIDE OF 0.3 TO 3.0, WHEN MEASURED AS A 0.5% SOLUTION AT 35*C.
Claim 2
Dependent Claim
25 words
A NORMALLY SOLID, ADDITION HOMOPOLYMER OF METHACROLEIN HAVING AN INHERENT VISCOSITY IN DIMETHYLFORMAMIDE OF 0.3 TO 3.0, WHEN MEASURED AS A 0.5% SOLUTION AT 35*C.
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) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |