US3244679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymethacrylic acid imides prepared by the reaction of polymethacrylic acid esters with ammonium salts
Assignee: Roehm GmbH Darmstadt
•
Filing: 1962-03-19
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Granted: 1966-04-05
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Expires: 1982-03-19
Abstract
No abstract record available.
Inventors
- 👤 Schroder Gunter
- 👤 Ruth H Tessmar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:35
CPC Classifications
C; C08; C08F; C08F8/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
THE METHOD OF MAKING IMIDE-CONTAINING POLYMERS WHICH COMPRISES REACTING NA AQUEOUS SOLUTION OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF WATER-SOLUBLE AMMONIUM SALTS AND WATER-SOLUBLE N-ALKYL AMMONIUM SALTS AT A TEMPERATURE BETWEEN ABOAUT 180*C. AND 300*C. WITH A POLYMER SELECTED FROM THE GROUP CONSISTING OF HOMOPOLYMER OF ESTERS OF METHACRYLIC ACID WITH AN ALCOHOL HAVING UP TO 6 CARBON ATOMS, COPOLYMERS OF SAID ESTERS WITH UP TO ABOUT 70 PERCENT BY WEIGHT OF OTHER METHACRYLYL MONOMERS, AND COPOLYMERS OF SAID ESTERS WITH UP TO ABOUT 45 PERCENT BY WEIGHT OF VINYL MONOMERS.
Claim 2
Independent Claim
93 words
THE METHOD OF MAKING IMIDE-CONTAINING POLYMERS WHICH COMPRISES REACTING NA AQUEOUS SOLUTION OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF WATER-SOLUBLE AMMONIUM SALTS AND WATER-SOLUBLE N-ALKYL AMMONIUM SALTS AT A TEMPERATURE BETWEEN ABOAUT 180*C. AND 300*C. WITH A POLYMER SELECTED FROM THE GROUP CONSISTING OF HOMOPOLYMER OF ESTERS OF METHACRYLIC ACID WITH AN ALCOHOL HAVING UP TO 6 CARBON ATOMS, COPOLYMERS OF SAID ESTERS WITH UP TO ABOUT 70 PERCENT BY WEIGHT OF OTHER METHACRYLYL MONOMERS, AND COPOLYMERS OF SAID ESTERS WITH UP TO ABOUT 45 PERCENT BY WEIGHT OF VINYL MONOMERS.
References Cited (Backward Citations)
US2146209A
Cited
US3076809A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |