US3329653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of condensation polymers in the presence of a non-solvent and a swelling agent
Assignee: Rohm and Haas Co
•
Filing: 1965-10-22
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Granted: 1967-07-04
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Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Ellington M Beavers
- 👤 Marvin J Hurwitz
- 👤 Fenton Donald Mason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:53
CPC Classifications
C; C08; C08G; C08G85/00; C08F; C08F8/00; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/19; C08G63/193; C08G63/195; C08G63/68; C08G63/688; C08G63/6884; C08G63/6886; C08G63/78; C08G63/79; C08G63/81; C08G64/00; C08G64/18; C08G64/183; C08G69/00; C08G69/02; C08G69/04; C08G69/26; C08G69/28; C08G69/30; C08G71/00; C08G71/02; C08L; C08L67/00; C08L67/02; C08G63/82; C08G63/83
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
IN A PROCESS FOR THE PREPARATION OF A CONDENSATION POLYMER OF THE CLASS CONSISTING OF POLYESTERS AND POLYAMIDES, INCLUDING POLYCARBAMIDES, WHEREIN AN OLIGOMERIC CONDENSATION PRODUCT IS HEATED AND A LOW MOLECULAR WEIGHT BY-PRODUCT IS VOLATILIZED FROM THE SYSTEM IN ORDER TO PROMOTE THE FORMATIONOF A HIGHER MOLECULAR WEIGHT POLYMER, THE IMPROVEMENT WHICH COMPRISES HEATING THE OLIGOMERIC CONDENSATION PRODUCT AS A DISPERSED, DISCONTINUOUS PHASE AT REFLUX TEMPERATURE IN A LIQUID NON-SOLVENT FOR THE CONDENSATION POLYMER THAT BOILS WITHIN THE RANGE OF 150*C. TO 300*C. WHICH NON-SOLVENT FORMS THE CONTINUOUS PHASE AND IN THE PRESENCE OF A SWELLING AGENT FOR SAID CONDENSATION POLYMER, SEPARATING THE LOW MOLECULAR WEIGHT BY-PRODUCT FROM THE SYSTEM AND REPLACING THE NON-SOLVENT AS NEEDED WHEREBY THE CONVERSION OF OLIGOMERIC CONCENSATION PRODUCTS TO HIGHER MOLECULAR WEIGHT CONDENSATION PRODUCTS IS ACCOMPLISHED WHILE THEY ARE DISPERSED AS A DISCONTINUOUS PHASE IN A LIQUID NON-SOLVENT CONTINUOUS PHASE.
Claim 2
Dependent Claim
145 words
IN A PROCESS FOR THE PREPARATION OF A CONDENSATION POLYMER OF THE CLASS CONSISTING OF POLYESTERS AND POLYAMIDES, INCLUDING POLYCARBAMIDES, WHEREIN AN OLIGOMERIC CONDENSATION PRODUCT IS HEATED AND A LOW MOLECULAR WEIGHT BY-PRODUCT IS VOLATILIZED FROM THE SYSTEM IN ORDER TO PROMOTE THE FORMATIONOF A HIGHER MOLECULAR WEIGHT POLYMER, THE IMPROVEMENT WHICH COMPRISES HEATING THE OLIGOMERIC CONDENSATION PRODUCT AS A DISPERSED, DISCONTINUOUS PHASE AT REFLUX TEMPERATURE IN A LIQUID NON-SOLVENT FOR THE CONDENSATION POLYMER THAT BOILS WITHIN THE RANGE OF 150*C. TO 300*C. WHICH NON-SOLVENT FORMS THE CONTINUOUS PHASE AND IN THE PRESENCE OF A SWELLING AGENT FOR SAID CONDENSATION POLYMER, SEPARATING THE LOW MOLECULAR WEIGHT BY-PRODUCT FROM THE SYSTEM AND REPLACING THE NON-SOLVENT AS NEEDED WHEREBY THE CONVERSION OF OLIGOMERIC CONCENSATION PRODUCTS TO HIGHER MOLECULAR WEIGHT CONDENSATION PRODUCTS IS ACCOMPLISHED WHILE THEY ARE DISPERSED AS A DISCONTINUOUS PHASE IN A LIQUID NON-SOLVENT CONTINUOUS PHASE.
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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) | 1970-07-03 | 1971-01-02 | 1971-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-03 | 1975-01-02 | 1975-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-03 | 1979-01-02 | 1979-07-04 | $7700.00 | Window Closed / Lapsed |