US3154546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methenamine undecylenate and method of preparation
Assignee: Gray Pharmaceutical Co
•
Filing: 1962-04-20
•
Granted: 1964-10-27
•
Expires: 1982-04-20
Abstract
No abstract record available.
Inventors
- 👤 Chessin Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:39
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/12; C07D487/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
2 words
METHENAMINE UNDECYLENATE.
Claim 2
Dependent Claim
2 words
METHENAMINE UNDECYLENATE.
Claim 3
Independent Claim
54 words
THE METHOD OF PREPARING METHENAMINE UNDECYLENATE WHICH COMPRISES COMBINING EQUIMOLAR QUANTITIES OF UNDECYLENIC ACID AND METHENAMINE IN THE PRESENCE OF A SOLVENT COMPRISING AN AQUEOUS SOLUTION CONSISTING OF FROM 5 TO 50 PERCENT OF CONCENTRATED AMMONIUM HYDROXIDE, AND AT A TEMPERATURE OF BETWEEN 0* TO 25*C. RECOVERING METHENAMINE UNDECYLENATE FROM THE RESULTANT REACTION PRODUCT.
Claim 4
Independent Claim
54 words
THE METHOD OF PREPARING METHENAMINE UNDECYLENATE WHICH COMPRISES COMBINING EQUIMOLAR QUANTITIES OF UNDECYLENIC ACID AND METHENAMINE IN THE PRESENCE OF A SOLVENT COMPRISING AN AQUEOUS SOLUTION CONSISTING OF FROM 5 TO 50 PERCENT OF CONCENTRATED AMMONIUM HYDROXIDE, AND AT A TEMPERATURE OF BETWEEN 0* TO 25*C. RECOVERING METHENAMINE UNDECYLENATE FROM THE RESULTANT 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) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |