US1737458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quaternary ammonium compound and process of making same
Assignee: BASF Schweiz AG
•
Filing: 1928-07-19
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Granted: 1929-11-26
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Expires: 1948-07-19
Abstract
No abstract record available.
Inventors
- 👤 Hartmann Max
- 👤 Kagi Johann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:09
CPC Classifications
C; C10; C10M; C10M133/00; C10M133/02; C10M133/30; C10M133/36
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) | 1932-11-25 | 1933-05-27 | 1933-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-11-25 | 1937-05-27 | 1937-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-11-25 | 1941-05-27 | 1941-11-26 | $7700.00 | Window Closed / Lapsed |