Patent US3819734A successfully refreshed from Google Patents.
US3819734A
Expired / Lapsed
US
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Hydrogenation process
Assignee: Goodyear Tire and Rubber Co
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Filing: 1972-05-05
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Granted: 1974-06-25
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Expires: 1992-05-05
Abstract
Abstract ACCORDING TO THE INVENTION THERE IS PROVIDED A HIGHLY ACTIVATED PROCESS FOT THE HYDROGENATION OF CYCLOPENTADIENE TO CYCLOPENTENE BY BRINGING THE CYCLOPENTADIENE INTO CONTACT WITH A CATALYST COMPRISING (1) NICKEL ON A METAL OXALATE, SAID METAL BEING SELECTED FROM THE GROUPS CONSISTING OF MAGNESIUM AND ZINC, (2) AT LEAST ONE LIGAND SELECTED FROM THE GROUP CONSISTING OF PHOSPHINES AND PHOSPHITES WHILE IN THE PRESENCE OF HYDROGEN AT TEMPERATURES FROM ABOUT 0*C. TO ABOUT 200*C. AND HYDROGEN PRESSURE RANGING FROM ABOUT 0 TO ABOUT 10,000 POUNDS PER SQUARE INCH GAUGE (P.S.I.G.).
Inventors
- 👤 V Kothari
- 👤 J Tazuma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:19
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/02; C07C5/03; C07C5/05; C07C2523/00; C07C2523/70; C07C2523/74; C07C2523/755; C07C2531/00; C07C2531/02; C07C2531/04; C07C2531/16; C07C2531/22; C07C2531/24; C07C2601/00; C07C2601/06; C07C2601/10
Claims Analysis
Total Claims: 0
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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) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |