Patent US3285894A successfully refreshed from Google Patents.
US3285894A
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Polymerization initiators comprising alkali metal alcoholates
Assignee: Czech Academy of Sciences
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Filing: 1963-10-11
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Granted: 1966-11-15
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Expires: 1983-10-11
Abstract
No abstract record available.
Inventors
- 👤 Lim Drahoslav
- 👤 Trekoval Jiri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:11
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/06; C08F4/08; C08F2/00; C08F2/36; C08F20/00; C08F20/02; C08F20/42; C08F20/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A METHOD OF POLYMERIZING A POLYMERIZABLE MONOMER SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRIDE AND THE ESTERS OF ACRYLIC ACID AND METHACRYLIC ACID WITH ALKANOLS HAVING ONE TO EIGHTEEN CARBON ATOMS, WHICH METHOD COMPRISES ADMIXING TO SAID MONOMER AN ALKALI METAL ALCOHOLATE OF A TERTIARY ALKANOL HAVING FOUR TO TWELVE CARBON ATOMS AT A TEMPERATURE BETWEEN -40*C. AND +20*C.
Claim 2
Independent Claim
59 words
A METHOD OF POLYMERIZING A POLYMERIZABLE MONOMER SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRIDE AND THE ESTERS OF ACRYLIC ACID AND METHACRYLIC ACID WITH ALKANOLS HAVING ONE TO EIGHTEEN CARBON ATOMS, WHICH METHOD COMPRISES ADMIXING TO SAID MONOMER AN ALKALI METAL ALCOHOLATE OF A TERTIARY ALKANOL HAVING FOUR TO TWELVE CARBON ATOMS AT A TEMPERATURE BETWEEN -40*C. AND +20*C.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |