Patent US2499215A successfully refreshed from Google Patents.
US2499215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quaternary ammonium derivatives
Assignee: —
•
Filing: —
•
Granted: 1950-02-28
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Expires: 1967-02-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:05
CPC Classifications
C; C08; C08L; C08L61/00; C08L61/04; C08L61/06; C08L61/14; C08G; C08G8/00; C08G8/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
AS NEW CHEMICAL COMPOUNDS, ACID-CATALYZED CONDENSATES FROM ETHERS OF 3,5-DIMETHYLPHENOL AND MONOHYDRIC ALIPHATIC ALCOHOLS, ROH, AND FORMALDEHYDE, R BEING A HYDROCARBON GROUP, SAID CONDENSABLE HAVING TWO TO FIVE PHENYL ETHER GROUPS PER MOLECULE CONNECTED BY METHYLENE BRIDGES, SAID PHENYL GROUPS ALSO BEING SUBSTITUTED WITH SUFFICIENT QUATERNARY AMMONIUM METHYLENE GROUPS TO RENDER THE COMPOUNDS DISPERSIBLE IN WATER, SAID GROUPS BEING OF THE STRUCTURE
Claim 2
Dependent Claim
62 words
AS NEW CHEMICAL COMPOUNDS, ACID-CATALYZED CONDENSATES FROM ETHERS OF 3,5-DIMETHYLPHENOL AND MONOHYDRIC ALIPHATIC ALCOHOLS, ROH, AND FORMALDEHYDE, R BEING A HYDROCARBON GROUP, SAID CONDENSABLE HAVING TWO TO FIVE PHENYL ETHER GROUPS PER MOLECULE CONNECTED BY METHYLENE BRIDGES, SAID PHENYL GROUPS ALSO BEING SUBSTITUTED WITH SUFFICIENT QUATERNARY AMMONIUM METHYLENE GROUPS TO RENDER THE COMPOUNDS DISPERSIBLE IN WATER, SAID GROUPS BEING OF THE STRUCTURE
References Cited (Backward Citations)
US2003291A
Cited
US2405806A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-27 | 1953-08-29 | 1954-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-27 | 1957-08-29 | 1958-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-27 | 1961-08-29 | 1962-02-28 | $7700.00 | Window Closed / Lapsed |