US3401207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making polynuclear aromatic compounds
Assignee: Gulf Research and Development Co
•
Filing: 1966-12-19
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Granted: 1968-09-10
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Expires: 1986-12-19
Abstract
No abstract record available.
Inventors
- 👤 Charles M Selwitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:08
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/76; C07C2527/00; C07C2527/06; C07C2531/00; C07C2531/02; C07C2531/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A PROCESS FOR THE PRODUCTION OF A POLYNUCLEAR AROMATIC COMPOUND FROM AN AROMATIC COMPOUND HAVING A LABILE HYDROGEN ATOM ATTACHED TO THE NUCLEUS THEREOF WHICH COMPRISES CONTACTING SAID LATTER AROMATIC COMPOUND WITH A NOBLE METAL SALT OF AN ORGANIC ACID IN THE PRESENCE OF A STRONG ACID IN A REACTION SYSTEM FREE OF HALIDE IONS AND NITRATE IONS.
Claim 2
Dependent Claim
58 words
A PROCESS FOR THE PRODUCTION OF A POLYNUCLEAR AROMATIC COMPOUND FROM AN AROMATIC COMPOUND HAVING A LABILE HYDROGEN ATOM ATTACHED TO THE NUCLEUS THEREOF WHICH COMPRISES CONTACTING SAID LATTER AROMATIC COMPOUND WITH A NOBLE METAL SALT OF AN ORGANIC ACID IN THE PRESENCE OF A STRONG ACID IN A REACTION SYSTEM FREE OF HALIDE IONS AND NITRATE IONS.
References Cited (Backward Citations)
US3145237A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-10 | 1972-03-11 | 1972-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-10 | 1976-03-11 | 1976-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-10 | 1980-03-11 | 1980-09-10 | $7700.00 | Window Closed / Lapsed |