Patent US3285918A successfully refreshed from Google Patents.
US3285918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1', 4', 5', 6'-tetrahydropyrimidino[a-4, 3]-4-aza-5-cholestene
Assignee: Individual
•
Filing: 1962-04-18
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Granted: 1966-11-15
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Expires: 1982-04-18
Abstract
No abstract record available.
Inventors
- 👤 Norman J Doorenbos
- 👤 Wu Mu Tsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:05
CPC Classifications
C; C07; C07D; C07D471/00; C07D471/02; C07D471/04; C07J; C07J73/00; C07J73/001; C07J73/003; C07J73/005
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) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |