US2764581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of pharmaceutically active hexamethylenetetramine products
Assignee: BASF SE
•
Filing: 1955-08-12
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Granted: 1956-09-25
•
Expires: 1975-08-12
Abstract
No abstract record available.
Inventors
- 👤 Scholz Heinrich
- 👤 Oettel Heinz
- 👤 Zeller Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:01
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/12; C07D487/18; Y; Y10; Y10S; Y10S424/00; Y10S424/06
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) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |