Patent US6178371B1 successfully refreshed from Google Patents.
US3240772A
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Method for stereospecific polymerization of acrylo monomers in the presence of a metal amide
Assignee: Montedison SpA
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Filing: 1960-06-28
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Granted: 1966-03-15
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Expires: 1980-06-28
Abstract
No abstract record available.
Inventors
- 👤 Natta Giulio
- 👤 Mazzanti Giorgio
- 👤 Longi Paolo
- 👤 Bernardini Francesco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:51
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/42; C07; C07F; C07F3/00; C07F3/003; C07F5/00; C07F5/06; C07F5/069; C08F20/10; C08F20/12; C08F20/52; C08F20/54; C08F20/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A METHOD OF POLYMERIZING ACRYLIC AND METHACRYLIC MONOMERS SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ACID ESTERS, METHACRYLIC ACID ESTERS, AMIDES OF ACRYLIC AND METHACRYLIC ACIDS, AND NITRILES OF ACRYLIC AND METHACRYLIC ACIDS WHICH COMPRISES POLYMERIZING SAID MONOMERS AT A TEMPERATURE RANGING FROM ABOUT -100*C. TO A +100*C. AND IN THE PRESENCE OF AN EFFECTIVE AMOUNT OF A CATALYST CONSISTING OF A COMPOUND OF THE FORMULA
Claim 2
Independent Claim
66 words
A METHOD OF POLYMERIZING ACRYLIC AND METHACRYLIC MONOMERS SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ACID ESTERS, METHACRYLIC ACID ESTERS, AMIDES OF ACRYLIC AND METHACRYLIC ACIDS, AND NITRILES OF ACRYLIC AND METHACRYLIC ACIDS WHICH COMPRISES POLYMERIZING SAID MONOMERS AT A TEMPERATURE RANGING FROM ABOUT -100*C. TO A +100*C. AND IN THE PRESENCE OF AN EFFECTIVE AMOUNT OF A CATALYST CONSISTING OF A COMPOUND OF THE FORMULA
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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) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |