US3000862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymethacrolein derivatives
Assignee: EIDP Inc
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Filing: 1958-01-13
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Granted: 1961-09-19
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Expires: 1978-01-13
Abstract
No abstract record available.
Inventors
- 👤 Eifert Robert Lee
- 👤 Marks Barnard Mitchel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:40
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/06; C08G2/14; C08G2/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A NORMALLY SOLID, HIGH MOLECULAR WEIGHT POLYMETHACROLEIN ACYLATE SUBSTANTIALLY FREE FROM ALDEHYDE GROUPS, AS MEASURED BY INFRARED SPECTROGRAPHIC ANALYSIS, AND CONTAINING LESS THAN 65% OF THE MAXIMUM THEORETICAL ACYL GROUPS, AS MEASURED BY HYDROLYSIS, SAID POLYMETHACROLEIN ACYLATE BEING CHARACTERIZED BY THE PRESENCE OF TETRAHYDROPYRANE RINGS IN THE POLYMER CHAIN THE MOLECULAR WEIGHT OF SAID POLYMETHACROLEIN ACYLATES BEING AT LEAST HIGH ENOUGH TO RESULT IN AN INHERENT VISCOSITY OF 0.55 AS MEASURED BY A 0.5 WEIGHT PERCENT SOLUTION OF THE POLYMETHACROLEIN ACYLATE IN DIMETHYL FORMAMIDE AT 35*C., THE ACYLATE GROUPS IN SAID POLYMETHACROLEIN ACYLATE CONTAINING FROM 2 TO 10 CARBON ATOMS.
Claim 2
Dependent Claim
100 words
A NORMALLY SOLID, HIGH MOLECULAR WEIGHT POLYMETHACROLEIN ACYLATE SUBSTANTIALLY FREE FROM ALDEHYDE GROUPS, AS MEASURED BY INFRARED SPECTROGRAPHIC ANALYSIS, AND CONTAINING LESS THAN 65% OF THE MAXIMUM THEORETICAL ACYL GROUPS, AS MEASURED BY HYDROLYSIS, SAID POLYMETHACROLEIN ACYLATE BEING CHARACTERIZED BY THE PRESENCE OF TETRAHYDROPYRANE RINGS IN THE POLYMER CHAIN THE MOLECULAR WEIGHT OF SAID POLYMETHACROLEIN ACYLATES BEING AT LEAST HIGH ENOUGH TO RESULT IN AN INHERENT VISCOSITY OF 0.55 AS MEASURED BY A 0.5 WEIGHT PERCENT SOLUTION OF THE POLYMETHACROLEIN ACYLATE IN DIMETHYL FORMAMIDE AT 35*C., THE ACYLATE GROUPS IN SAID POLYMETHACROLEIN ACYLATE CONTAINING FROM 2 TO 10 CARBON ATOMS.
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) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |