US1567200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of derivatives of 4-hydroxypiperidines and process of making same
Assignee: BASF Schweiz AG
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Filing: 1925-03-28
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Granted: 1925-12-29
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Expires: 1945-03-28
Abstract
No abstract record available.
Inventors
- 👤 Staudinger Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:25
CPC Classifications
C; C07; C07D; C07D211/00; C07D211/02; C07D211/04; C07D211/06; C07D211/36; C07D211/40; C07D211/44; C07D211/46
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) | 1928-12-28 | 1929-06-29 | 1929-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-12-28 | 1933-06-29 | 1933-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-12-28 | 1937-06-29 | 1937-12-29 | $7700.00 | Window Closed / Lapsed |