Patent US3372137A successfully refreshed from Google Patents.
US3372137A
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Process for preparing mineral reinforced polylactam compositions
Assignee: Monsanto Co
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Filing: 1964-06-03
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Granted: 1968-03-05
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Expires: 1984-06-03
Abstract
No abstract record available.
Inventors
- 👤 Paul A Tierney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:47
CPC Classifications
C; C08; C08L; C08L77/00; C08L77/02; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/14; C08G69/16; C08G69/18; C08K; C08K9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A PROCESS FOR PREPARING POLYLACTAM COMPOSITIONS COMPRISING (A) COMBINING LACTAM MONOMER, BASIC LACTAM POLYMERIZATION CATALYST, LACTAM POLYMERIZATION INITIATOR, AND INORGANIC MATERIAL HEAT-PRETREATED AT TEMPERATURES ABOVE ABOUT 375*C. FOR A TIME SUFFICIENT TO REMOVE SURFACE HYDROXYL GROUP; AND (B) HEATING THE MIXTURE FORMED THEREBY AT A TEMPERATURE FROM ABOUT THE MELTING POINT OF SAID LACTAM UP TO ABOUT 250*C. FOR A TIME SUFFICIENT TO CAUSE POLYMERIZATION.
Claim 2
Dependent Claim
65 words
A PROCESS FOR PREPARING POLYLACTAM COMPOSITIONS COMPRISING (A) COMBINING LACTAM MONOMER, BASIC LACTAM POLYMERIZATION CATALYST, LACTAM POLYMERIZATION INITIATOR, AND INORGANIC MATERIAL HEAT-PRETREATED AT TEMPERATURES ABOVE ABOUT 375*C. FOR A TIME SUFFICIENT TO REMOVE SURFACE HYDROXYL GROUP; AND (B) HEATING THE MIXTURE FORMED THEREBY AT A TEMPERATURE FROM ABOUT THE MELTING POINT OF SAID LACTAM UP TO ABOUT 250*C. FOR A TIME SUFFICIENT TO CAUSE POLYMERIZATION.
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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) | 1971-03-05 | 1971-09-04 | 1972-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-05 | 1975-09-04 | 1976-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-05 | 1979-09-04 | 1980-03-05 | $7700.00 | Window Closed / Lapsed |