US2814655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of high boiling propylene polymers employing liquid phosphoric acid catalyst
Assignee: California Research LLC
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Filing: 1955-09-30
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Granted: 1957-11-26
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Expires: 1975-09-30
Abstract
No abstract record available.
Inventors
- 👤 Gordon E Langlois
- 👤 Paul E Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:29
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
67 words
A PROCESS FOR PRODUCING PROPYLENE POLYMERS BOILING PREDOMINANTLY IN THE RANGE OF FROM ABOUT 425* TO 650* F, FROM A PROPYLENE-CONTAINING, LIQUEFIED, NORMALLY GASEOUS HYDROCARBON FEED, WHICH COMPRISES INTIMATELY CONTACTING SAID HYDROCARBON FEED AT A SPACE VELOCITY OF FROM ABOUT 0.1 TO 5.0 V./V./HR. WITH A BODY OF LIQUID PHROSPHORIC ACID HAVING A CONCENTRATION OF FROM ABOUT 117% TO 122% ORTHO-PHOSHORIC ACID AT A TEMPERTURE OF FROM
Claim 2
Dependent Claim
67 words
A PROCESS FOR PRODUCING PROPYLENE POLYMERS BOILING PREDOMINANTLY IN THE RANGE OF FROM ABOUT 425* TO 650* F, FROM A PROPYLENE-CONTAINING, LIQUEFIED, NORMALLY GASEOUS HYDROCARBON FEED, WHICH COMPRISES INTIMATELY CONTACTING SAID HYDROCARBON FEED AT A SPACE VELOCITY OF FROM ABOUT 0.1 TO 5.0 V./V./HR. WITH A BODY OF LIQUID PHROSPHORIC ACID HAVING A CONCENTRATION OF FROM ABOUT 117% TO 122% ORTHO-PHOSHORIC ACID AT A TEMPERTURE OF FROM
References Cited (Backward Citations)
US2592428A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-25 | 1961-05-27 | 1961-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-25 | 1965-05-27 | 1965-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-25 | 1969-05-27 | 1969-11-26 | $7700.00 | Window Closed / Lapsed |