Patent US2993937A successfully refreshed from Google Patents.
US2993937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorination of aromatic compounds
Assignee: Stauffer Chemical Co
•
Filing: 1958-10-10
•
Granted: 1961-07-25
•
Expires: 1978-10-10
Abstract
No abstract record available.
Inventors
- 👤 Attila E Pavlath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:50
CPC Classifications
H; H05; H05K; H05K13/00; H05K13/02; C; C07; C07B; C07B39/00; C07C; C07C17/00; C07C17/093; C07C17/10; C07C17/12; C07C201/00; C07C201/06; C07C201/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A PROCESS FOR SUBSTITUTING FLUORINE IN PLACE OF A HYDROGEN ON AN AROMATIC NUCLEUS WITHOUT AFFECTING THE DEGREE OF UNSATURATION OF SAID NUCLEUS COMPRISING: REACTING AN AROMATIC COMPOUND HAVING AT LEAST AT SINGLE HYDROGEN BONDED TO THE AROMATIC NUCLEUS THEREOF WITH A HALOGEN FLUORIDE IN THE PRESENCE OF A CATALYST SELECTED FROM THE CLASS CONSISTING OF FLUORIDES OF ARSENIC, ANTIMONY, PHOSPHORUS, BORON, TANTALUM, VANADIUM AND NIOBIUM, AND RECOVERING A FLUORINATED AROMATIC REACTION PRODUCT.
Claim 2
Dependent Claim
73 words
A PROCESS FOR SUBSTITUTING FLUORINE IN PLACE OF A HYDROGEN ON AN AROMATIC NUCLEUS WITHOUT AFFECTING THE DEGREE OF UNSATURATION OF SAID NUCLEUS COMPRISING: REACTING AN AROMATIC COMPOUND HAVING AT LEAST AT SINGLE HYDROGEN BONDED TO THE AROMATIC NUCLEUS THEREOF WITH A HALOGEN FLUORIDE IN THE PRESENCE OF A CATALYST SELECTED FROM THE CLASS CONSISTING OF FLUORIDES OF ARSENIC, ANTIMONY, PHOSPHORUS, BORON, TANTALUM, VANADIUM AND NIOBIUM, AND RECOVERING A FLUORINATED AROMATIC REACTION PRODUCT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |