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Patent US2592428A successfully refreshed from Google Patents.
US2592428A
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Polymerization of propylene with liquid phosphoric acid
Assignee: California Research LLC
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Filing: 1949-06-04
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Granted: 1952-04-08
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Expires: 1969-06-04
Abstract
No abstract record available.
Inventors
- 👤 Jacob D Kemp
- 👤 Lloyd F Brooke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:04
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/14; C07C2/18; C07C2527/00; C07C2527/14; C07C2527/16; C07C2527/167; C07C2527/173
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A PROCESS FOR THE POLYMERIZATION OF PROPYLENE CHARACTERIZED BY THE CONVERSION OF AT LEAST 50% OF THE PROPYLENE TO LIQUID POLYMER IN A SINGLE STAGE OPERATION, SAID LIQUID POLYMER CONTAINING AT LEAST 50% OF POLYMERS BOILING ABOVE ABOUT 350* F. WHICH COMPRISES MAINTAINING A BODY OF LIQUID PHOSPHORIC ACID HAVING A CONCENTATION IN THE RANGE 103% TO 116% ORTHOPHOSPHORIC ACID IN A REACTION ZONE, MAINTAINING IN THE REACTION ZONE A TEMPERATURE IN THE RANGE 225* F. TO 300* F.
Claim 2
Dependent Claim
79 words
A PROCESS FOR THE POLYMERIZATION OF PROPYLENE CHARACTERIZED BY THE CONVERSION OF AT LEAST 50% OF THE PROPYLENE TO LIQUID POLYMER IN A SINGLE STAGE OPERATION, SAID LIQUID POLYMER CONTAINING AT LEAST 50% OF POLYMERS BOILING ABOVE ABOUT 350* F. WHICH COMPRISES MAINTAINING A BODY OF LIQUID PHOSPHORIC ACID HAVING A CONCENTATION IN THE RANGE 103% TO 116% ORTHOPHOSPHORIC ACID IN A REACTION ZONE, MAINTAINING IN THE REACTION ZONE A TEMPERATURE IN THE RANGE 225* F. TO 300* F.
References Cited (Backward Citations)
US2186031A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-08 | 1955-10-08 | 1956-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-08 | 1959-10-08 | 1960-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-08 | 1963-10-08 | 1964-04-08 | $7700.00 | Window Closed / Lapsed |