US2987500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of polymethacrylic acid esters
Assignee: Individual
•
Filing: 1957-05-03
•
Granted: 1961-06-06
•
Expires: 1977-05-03
Abstract
No abstract record available.
Inventors
- 👤 Rossetti Carlo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:48
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A POLYMERIZATION PROCESS WHICH COMPRISES MIXING A POLYMERIZABLE METHACRYLIC ACID ESTER WITH A COMPOUND OF THE FORMULA R.SOO.X WHEREIN R IS A MEMBER OF THE GROUP CONSISTING OF AROMATIC AND SATURATED ALIPHATIC HYDROCARBON RADICALS AND X REPRESENTS A MEMBER OF THE GROUP CONSISTING OF HYDROGEN, AN ALKALI METAL, NH4, AND AN ALKALINE EARTH METAL CONNECTED WITH ITS SECOND BOND TO A SECOND GROUP R.SOO- WHEREIN R HAS THE SAME MEANING AS ABOVE, IN THE PRESENCE OF A MEMBER OF THE GROUP CONSISTING OF QUATERNARY AMMONIUM BASES AND QUATERNARY AMMONIUM SALTS.
Claim 2
Dependent Claim
90 words
A POLYMERIZATION PROCESS WHICH COMPRISES MIXING A POLYMERIZABLE METHACRYLIC ACID ESTER WITH A COMPOUND OF THE FORMULA R.SOO.X WHEREIN R IS A MEMBER OF THE GROUP CONSISTING OF AROMATIC AND SATURATED ALIPHATIC HYDROCARBON RADICALS AND X REPRESENTS A MEMBER OF THE GROUP CONSISTING OF HYDROGEN, AN ALKALI METAL, NH4, AND AN ALKALINE EARTH METAL CONNECTED WITH ITS SECOND BOND TO A SECOND GROUP R.SOO- WHEREIN R HAS THE SAME MEANING AS ABOVE, IN THE PRESENCE OF A MEMBER OF THE GROUP CONSISTING OF QUATERNARY AMMONIUM BASES AND QUATERNARY AMMONIUM SALTS.
References Cited (Backward Citations)
US2567803A
Cited
US2768156A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |