Patent US3832251A successfully refreshed from Google Patents.
Patent US2614137A successfully refreshed from Google Patents.
US2614137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of selective olefinic polymers
Assignee: Universal Oil Products Co
•
Filing: 1947-11-28
•
Granted: 1952-10-14
•
Expires: 1967-11-28
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Chenicek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:42
CPC Classifications
C; C07; C07C; C07C6/00; C07C6/02; C07C6/04; C07C11/00; C07C11/02; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/14; C07C2/18; C07C2521/00; C07C2521/02; C07C2521/04; C07C2521/06; C07C2521/08; C07C2521/10; C07C2523/00; C07C2523/12; C07C2527/00; C07C2527/14; C07C2527/16; C07C2527/167; C07C2527/173
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A COMBINATION POLYMERIZATION-DISPROPORTIONATION PROCESS FOR INCREASING THE YIELD OF A DESIRED OLEFINIC POLYMER FROM THE PRODUCTS OF POLYMERIZING AN OLEFINIC MONOMER WHICH COMPRISES POLYMERIZING SAID OLEFINIC MONOMER IN A FIRST REACTION ZONE IN THE PRESENCE OF A SOLID PHOSPHORIC ACID CATALYST TO FORM A PRODUCT CONTAINING SAID DESIRED POLYMER HAVING A MOLECULAR WEIGHT INTERMEDIATE BETWEEN THE LOWER AND HIGHER MOLECULAR WEIGHT POLYMERS CONTAINED IN SAID PRODUCT, SEPARATING SAID DESIRED POLYMER FROM SAID PRODUCT AND SUBJECTING THE RESIDUAL LOWER AND HIGHER MOLECULAR WEIGHT POLYMERS IN ADMIXTURE TO A DISPROPORTOONATION REACTION IN A SECOND REACTION ZONE IN THE PRESENCE OF A CATALYST COMPRISING A SILICEOUS ADSORBENT TO AVERAGE THE MOLECULAR WEIGHTS OF SAID LATTER POLYMERS FORMING
Claim 2
Dependent Claim
114 words
A COMBINATION POLYMERIZATION-DISPROPORTIONATION PROCESS FOR INCREASING THE YIELD OF A DESIRED OLEFINIC POLYMER FROM THE PRODUCTS OF POLYMERIZING AN OLEFINIC MONOMER WHICH COMPRISES POLYMERIZING SAID OLEFINIC MONOMER IN A FIRST REACTION ZONE IN THE PRESENCE OF A SOLID PHOSPHORIC ACID CATALYST TO FORM A PRODUCT CONTAINING SAID DESIRED POLYMER HAVING A MOLECULAR WEIGHT INTERMEDIATE BETWEEN THE LOWER AND HIGHER MOLECULAR WEIGHT POLYMERS CONTAINED IN SAID PRODUCT, SEPARATING SAID DESIRED POLYMER FROM SAID PRODUCT AND SUBJECTING THE RESIDUAL LOWER AND HIGHER MOLECULAR WEIGHT POLYMERS IN ADMIXTURE TO A DISPROPORTOONATION REACTION IN A SECOND REACTION ZONE IN THE PRESENCE OF A CATALYST COMPRISING A SILICEOUS ADSORBENT TO AVERAGE THE MOLECULAR WEIGHTS OF SAID LATTER POLYMERS FORMING
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-14 | 1956-04-14 | 1956-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-14 | 1960-04-14 | 1960-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-14 | 1964-04-14 | 1964-10-14 | $7700.00 | Window Closed / Lapsed |