US2982780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of benzonitrile and phthalonitriles
Assignee: Pure Oil Co
•
Filing: 1958-10-20
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Granted: 1961-05-02
•
Expires: 1978-10-20
Abstract
No abstract record available.
Inventors
- 👤 William L Fierce
- 👤 Walter J Sandner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:01
CPC Classifications
C; C07; C07C; C07C255/00; C07C255/49; C07C255/50; C07C255/51
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A METHOD OF PREPARING COMPOUNDS OF THE GROUP CONSISTING OF BENZONITRILE AND THE PHTHALONITRILES WHICH COMPRISES REACTING BENZENE WITH CYANOGEN AT A TEMPERATURE IN THE RANGE OF ABOUT 475*-1000*C. IN CONTACT WITH A CATALYST CONSISTING OF A SMALL BUT CATALYTICALLY EFFECTIVE AMOUNT OF A GROUP VIII NOBLE METAL DEPOSITED ON A REFRACTORY SUPPORT.
Claim 2
Independent Claim
53 words
A METHOD OF PREPARING COMPOUNDS OF THE GROUP CONSISTING OF BENZONITRILE AND THE PHTHALONITRILES WHICH COMPRISES REACTING BENZENE WITH CYANOGEN AT A TEMPERATURE IN THE RANGE OF ABOUT 475*-1000*C. IN CONTACT WITH A CATALYST CONSISTING OF A SMALL BUT CATALYTICALLY EFFECTIVE AMOUNT OF A GROUP VIII NOBLE METAL DEPOSITED ON A REFRACTORY SUPPORT.
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) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |