US3520933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of amines
Assignee: BASF SE
•
Filing: 1967-10-23
•
Granted: 1970-07-21
•
Expires: 1987-10-23
Abstract
No abstract record available.
Inventors
- 👤 Karl Adam
- 👤 Erich Haarer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:54
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/24; C07C209/26; C07C209/04; C07C209/14; C07C209/16; C07C211/00; C07C211/01; C07C211/02; C07C211/03; C07C211/33; C07C211/34; C07C211/35; C07C211/36; C07C213/00; C07C213/02; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3128311A
Cited
US3383417A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-20 | 1974-01-19 | 1974-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-20 | 1978-01-19 | 1978-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-20 | 1982-01-19 | 1982-07-21 | $7700.00 | Window Closed / Lapsed |