US3242173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Basic tri-substituted pyrimido-[4, 5-d]-pyrimidines
Assignee: C.H. Boehringer Sohn AG and Co KG
•
Filing: 1963-01-11
•
Granted: 1966-03-22
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Expires: 1983-01-11
Abstract
No abstract record available.
Inventors
- 👤 Ohnacker Gerhard
- 👤 Woitun Eberhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:25
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
7 words
2,7 - DIMORPHOLINO - 4 - ETHOXY-PYRIMIDO-(4,5-D)PYRIMIDINE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |