Patent US2948759A successfully refreshed from Google Patents.
US2948759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of nitrating aromatic hydrocarbons aided by an aromatic ion exchange resin
Assignee: Pittsburgh Coke and Chemical Co
•
Filing: 1958-02-11
•
Granted: 1960-08-09
•
Expires: 1978-02-11
Abstract
No abstract record available.
Inventors
- 👤 Oscar L Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:32
CPC Classifications
C; C07; C07C; C07C201/00; C07C201/06; C07C201/08; B; B01; B01J; B01J31/00; B01J31/02; B01J31/06; B01J31/08; B01J31/10; C07B; C07B43/00; C07B43/02; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/06; C07C2603/10; C07C2603/12; C07C2603/20; C07C2603/22; C07C2603/24; C07C2603/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A PROCESS OF NITRATING AN AROMATIC HYDROCARBON COMPRISING CARRYING OUT THE NITRATION WITH NITRIC ACID IN THE PRESENCE OF A NUCLEAR SULFONATED COPOLYMER OF A MONOVINCYL AROMATIC HYDROCARBON AND POLYVINYL AROMATIC HYDROCARBON ION EXCHANGE RESIN.
Claim 2
Dependent Claim
35 words
A PROCESS OF NITRATING AN AROMATIC HYDROCARBON COMPRISING CARRYING OUT THE NITRATION WITH NITRIC ACID IN THE PRESENCE OF A NUCLEAR SULFONATED COPOLYMER OF A MONOVINCYL AROMATIC HYDROCARBON AND POLYVINYL AROMATIC HYDROCARBON ION EXCHANGE RESIN.
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) | 1963-08-09 | 1964-02-08 | 1964-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-09 | 1968-02-08 | 1968-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-09 | 1972-02-08 | 1972-08-09 | $7700.00 | Window Closed / Lapsed |