Patent US2620364A successfully refreshed from Google Patents.
US2620364A
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Polymerization of olefins with a boron phosphate catalyst
Assignee: Atlantic Richfield Co
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Filing: 1948-04-14
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Granted: 1952-12-02
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Expires: 1968-04-14
Abstract
No abstract record available.
Inventors
- 👤 Robert C Krug
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:06
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
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A METHOD OF POLYMERIZING ALIPHATIC MONOOLEFINS CONTAINING FROM 3 TO 10 CARBONS ATOMS, WHICH COMPRISES CONTACTING SAID MONO-OLEFIN WITH A BORON PHOSPHATE CATALYST AT A TEMPERATURE BETWEEN 150* F. AND 600* F. AT A SPACE VELOCITY BETWEEN 0.5 AND 3 VOLUMES OF MONO-OLEFIN PER VOLUME OF CATALYST PER HOUR, AND RECOVERING THE RESULTING OLEFIN POLYMERS.
Claim 2
Independent Claim
55 words
A METHOD OF POLYMERIZING ALIPHATIC MONOOLEFINS CONTAINING FROM 3 TO 10 CARBONS ATOMS, WHICH COMPRISES CONTACTING SAID MONO-OLEFIN WITH A BORON PHOSPHATE CATALYST AT A TEMPERATURE BETWEEN 150* F. AND 600* F. AT A SPACE VELOCITY BETWEEN 0.5 AND 3 VOLUMES OF MONO-OLEFIN PER VOLUME OF CATALYST PER HOUR, AND RECOVERING THE RESULTING OLEFIN POLYMERS.
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) | 1955-12-02 | 1956-06-02 | 1956-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-02 | 1960-06-02 | 1960-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-02 | 1964-06-02 | 1964-12-02 | $7700.00 | Window Closed / Lapsed |