US3030341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of prepolymers
Assignee: FMC Corp
•
Filing: 1959-05-06
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Granted: 1962-04-17
•
Expires: 1979-05-06
Abstract
No abstract record available.
Inventors
- 👤 Paul E Willard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:06
CPC Classifications
C; C08; C08G; C08G77/00; C08F; C08F18/00; C08F18/02; C08F18/04; C08F18/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
191 words
THE METHOD OF PRODUCING A DRY , FREE FLOWING, FUSIBLE POLYMER CONTAINING RESIDUAL UNSATURATED AND CAPABLE OF FURTHER POLYMERIZATION TO A THERMOSET RESIN, COMPRISING POLYMERIZING A MONOMERIC POLYALLYLIC ESTER OF A POLYCARBOXYLIC ACID WHEREIN THE ALLYL GROUP IS SELECTED FROM THE CLASS CONSISTING OF ALKYL AND METHALLYL, UNDER FREE RADICALS POLYMERIZATION CONDITIONS TERMINATING SAID POLYMERIZATION BEFORE GELATION OCCURS, THEREBY PRODUCING A SOLUTION OF POLYMER IN MONOMER; PASSING SAID SOLUTION OF POLYMER IN MONOMER INTO A SHEARING ZONE, SAID SHEARING ZONE ACTING ON A SMALL CROSS-SECTIONAL AREA OF SAID SOLUTION; SUBJECTING SAID SOLUTION TO HIGH SHEARING STRESSES IN THE SHEARING ZONE; SIMULTANEOUSLY PASSING INTO SAID SHEARING ZONE AT LEAST TWO VOLUMES OF SAID SOLUTION OF AN UNREACTIVE LIQUID PRECIPITANT WHICH IS A SOLVENT FOR SAID MONOMER AND A NONSOLVENT FOR SAID POLKYMER, THUS PRECIPIITATING THE POLYMER WHILE IN THE SHEARING ZONE AND SIMULTANEOUSLY DISSOLVING THE MONOMER IN SAID LIQUID PRECIPISHEARING ZONE; SEPARATING THE PRECIPITATED POLYMER FROM SOLUTION OF MONOMER IN LIQUID PRECIPITANT OUT OF SAID SHEARING ZONE; SEPARATING THE PRECIPITANT POLYMER FROM THE SOLUTION OF MONOMER IN LIQUID PRECIPITANT AND WASHING AND DRYING SAID POLYMER; THEREBY PRODUCING A FREE FLOWING FUSIBLE POLYMER.
Claim 2
Independent Claim
191 words
THE METHOD OF PRODUCING A DRY , FREE FLOWING, FUSIBLE POLYMER CONTAINING RESIDUAL UNSATURATED AND CAPABLE OF FURTHER POLYMERIZATION TO A THERMOSET RESIN, COMPRISING POLYMERIZING A MONOMERIC POLYALLYLIC ESTER OF A POLYCARBOXYLIC ACID WHEREIN THE ALLYL GROUP IS SELECTED FROM THE CLASS CONSISTING OF ALKYL AND METHALLYL, UNDER FREE RADICALS POLYMERIZATION CONDITIONS TERMINATING SAID POLYMERIZATION BEFORE GELATION OCCURS, THEREBY PRODUCING A SOLUTION OF POLYMER IN MONOMER; PASSING SAID SOLUTION OF POLYMER IN MONOMER INTO A SHEARING ZONE, SAID SHEARING ZONE ACTING ON A SMALL CROSS-SECTIONAL AREA OF SAID SOLUTION; SUBJECTING SAID SOLUTION TO HIGH SHEARING STRESSES IN THE SHEARING ZONE; SIMULTANEOUSLY PASSING INTO SAID SHEARING ZONE AT LEAST TWO VOLUMES OF SAID SOLUTION OF AN UNREACTIVE LIQUID PRECIPITANT WHICH IS A SOLVENT FOR SAID MONOMER AND A NONSOLVENT FOR SAID POLKYMER, THUS PRECIPIITATING THE POLYMER WHILE IN THE SHEARING ZONE AND SIMULTANEOUSLY DISSOLVING THE MONOMER IN SAID LIQUID PRECIPISHEARING ZONE; SEPARATING THE PRECIPITATED POLYMER FROM SOLUTION OF MONOMER IN LIQUID PRECIPITANT OUT OF SAID SHEARING ZONE; SEPARATING THE PRECIPITANT POLYMER FROM THE SOLUTION OF MONOMER IN LIQUID PRECIPITANT AND WASHING AND DRYING SAID POLYMER; THEREBY PRODUCING A FREE FLOWING FUSIBLE POLYMER.
References Cited (Backward Citations)
US283258A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-16 | 1965-10-16 | 1966-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-16 | 1969-10-16 | 1970-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-16 | 1973-10-16 | 1974-04-17 | $7700.00 | Window Closed / Lapsed |