US2561468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
p-n-mono- and disubstituted aminohydroxyalkylbenzoates and processes of producing same
Assignee: J B WILLIAMS Co
•
Filing: 1949-06-16
•
Granted: 1951-07-24
•
Expires: 1969-06-16
Abstract
No abstract record available.
Inventors
- 👤 Herbert H Guest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:44
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/44; A61K8/445; A61Q; A61Q17/00; A61Q17/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
THE METHOD OF PRODUCING A REACTION PRODUCT OF P-AMINOBENZOIC ACID AND AN ALKYLENE OXIDE WHICH COMPRISES REACTING IN THE PRESENCE OF AN ALKALI METAL HYDROXIDE, P-AMINOBENZOIC ACID WITH AN ALKYLENE OXIDE HAVING MORE THAN ONE AND LESS THAN FOUR CARBON ATOMS IN THE RATIO OF 1 MOL OF P-AMINOBENZOIC ACID TO 2 TO 8 MOLS OF SAID ALKYLENE OXIDE.
Claim 2
Independent Claim
59 words
THE METHOD OF PRODUCING A REACTION PRODUCT OF P-AMINOBENZOIC ACID AND AN ALKYLENE OXIDE WHICH COMPRISES REACTING IN THE PRESENCE OF AN ALKALI METAL HYDROXIDE, P-AMINOBENZOIC ACID WITH AN ALKYLENE OXIDE HAVING MORE THAN ONE AND LESS THAN FOUR CARBON ATOMS IN THE RATIO OF 1 MOL OF P-AMINOBENZOIC ACID TO 2 TO 8 MOLS OF SAID ALKYLENE OXIDE.
References Cited (Backward Citations)
US1022645A
Cited
US1334641A
Cited
US1418900A
Cited
US2056656A
Cited
GB477843A
Cited
US2128334A
Cited
US2274725A
Cited
US2327899A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |