US3138600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bis (tetrahydroisoquinolyl) alkanes
Assignee: Bayer Corp
•
Filing: 1959-05-25
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Granted: 1964-06-23
•
Expires: 1979-05-25
Abstract
No abstract record available.
Inventors
- 👤 Otis E Fanchere
- 👤 Hayao Shin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:51
CPC Classifications
C; C07; C07D; C07D217/00; C07D217/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2659728A
Cited
US2744901A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |