US2546274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Derivatives of disubstituted methane compounds and method of making them
Assignee: Ward Blenkinsop and Co Ltd
•
Filing: 1947-06-23
•
Granted: 1951-03-27
•
Expires: 1967-06-23
Abstract
No abstract record available.
Inventors
- 👤 Pritchard Gordon James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:48
CPC Classifications
C; C07; C07C; C07C309/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A METHOD OF MANUFACTURING NEW DERIVATIVES OF METHANE IN WHICH A SULPHONIC ACID SELECTED FROM THE GROUP CONSISTING OF AROMATIC MONO-, DI-, AND POLYSULPHONIC ACIDS, AND HYDROXY, HALOGEN AND AMINO SUBSTITUTED AROMATIC MONO-, DI-, AND POLYSULPHONIC ACIDS, ALL OF SAID ACIDS HAVING AT LEAST ONE REPLACEABLE HYDROGEN ATOM IN THE AROMATIC RING, A CARBONYL COMPOUND SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF ALDEHYDIC FUNCTION HAVING AT LEAST TWO CARBON ATOMS AND KETONES, AND A COMPOUND OF THE FORMULA R3.HG.A, WHERE R3 IS A RADICAL SELECTED FROM THE GROUP CONSISTING OF ALKYL, ARYL, ARALKYL, AND HETEROCYCLIC RADICALS AND A IS AN ACID RADICAL ARE REACTED.
Claim 2
Independent Claim
105 words
A METHOD OF MANUFACTURING NEW DERIVATIVES OF METHANE IN WHICH A SULPHONIC ACID SELECTED FROM THE GROUP CONSISTING OF AROMATIC MONO-, DI-, AND POLYSULPHONIC ACIDS, AND HYDROXY, HALOGEN AND AMINO SUBSTITUTED AROMATIC MONO-, DI-, AND POLYSULPHONIC ACIDS, ALL OF SAID ACIDS HAVING AT LEAST ONE REPLACEABLE HYDROGEN ATOM IN THE AROMATIC RING, A CARBONYL COMPOUND SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF ALDEHYDIC FUNCTION HAVING AT LEAST TWO CARBON ATOMS AND KETONES, AND A COMPOUND OF THE FORMULA R3.HG.A, WHERE R3 IS A RADICAL SELECTED FROM THE GROUP CONSISTING OF ALKYL, ARYL, ARALKYL, AND HETEROCYCLIC RADICALS AND A IS AN ACID RADICAL ARE REACTED.
References Cited (Backward Citations)
US1986044A
Cited
US2021137A
Cited
US2131008A
Cited
US2140878A
Cited
US2215457A
Cited
US2335136A
Cited
GB547564A
Cited
US2344019A
Cited
GB552751A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-26 | 1954-09-25 | 1955-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-26 | 1958-09-25 | 1959-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-26 | 1962-09-25 | 1963-03-27 | $7700.00 | Window Closed / Lapsed |