US3289845A
Expired / Lapsed
US
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Assignee: BASF Schweiz AG
•
Filing: 1963-05-27
•
Granted: 1966-12-06
•
Expires: 1983-05-27
Abstract
No abstract record available.
Inventors
- 👤 Weber Oscar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:41
CPC Classifications
B; B01; B01D; B01D25/00; B01D25/12; B01D25/164; B01D25/28; B01D25/282; B01D25/285
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1308943A
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US1330332A
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US2849121A
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FR1149495A
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US3011642A
Cited
US3017996A
Cited
US3098429A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |