US2191922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quaternary methallyl ammonium halides
Assignee: Rohm and Haas Co
•
Filing: 1936-11-10
•
Granted: 1940-02-27
•
Expires: 1956-11-10
Abstract
No abstract record available.
Inventors
- 👤 Herman A Bruson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:49
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/08; C07D295/084; C07D295/088; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-02-26 | 1943-08-28 | 1944-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-02-26 | 1947-08-28 | 1948-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-02-26 | 1951-08-28 | 1952-02-27 | $7700.00 | Window Closed / Lapsed |