US2963412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing ketene
Assignee: Union Oil Company of California
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Filing: 1957-07-26
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Granted: 1960-12-06
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Expires: 1977-07-26
Abstract
No abstract record available.
Inventors
- 👤 Orville L Polly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:22
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/08; B01J19/081; C; C07; C07C; C07C45/00; C07C45/87; C07C45/88
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A METHOD FOR PREPARING KETENE FROM ACETONE WHICH COMPRISES HEATING ACETONE FOR ABOUT ONE SECOND TO SIXTY MINUTES AT A TEMPERATURE BETWEEN ABOUT 200* AND 400*C. IN THE PRESENCE OF GAMMA RADIATIONS OF ABOUT 0.45 TO 2.76 MEV. ENERGY LEVEL, AND RECOVERING KETENE FROM THE RESULTING PRODUCT, THE INTENSITY OF SAID GAMMA RADIATIONS WITHIN THE REACTION ZONE BEING BETWEEN ABOUT 10**4 AND 10**8 ROENTGENS PER HOUR PER CUBIC CENTIMETER.
Claim 2
Independent Claim
69 words
A METHOD FOR PREPARING KETENE FROM ACETONE WHICH COMPRISES HEATING ACETONE FOR ABOUT ONE SECOND TO SIXTY MINUTES AT A TEMPERATURE BETWEEN ABOUT 200* AND 400*C. IN THE PRESENCE OF GAMMA RADIATIONS OF ABOUT 0.45 TO 2.76 MEV. ENERGY LEVEL, AND RECOVERING KETENE FROM THE RESULTING PRODUCT, THE INTENSITY OF SAID GAMMA RADIATIONS WITHIN THE REACTION ZONE BEING BETWEEN ABOUT 10**4 AND 10**8 ROENTGENS PER HOUR PER CUBIC CENTIMETER.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-06 | 1964-06-06 | 1964-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-06 | 1968-06-06 | 1968-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-06 | 1972-06-06 | 1972-12-06 | $7700.00 | Window Closed / Lapsed |