Patent US1684336A successfully refreshed from Google Patents.
Patent US3041340A successfully refreshed from Google Patents.
US3041340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing substituted
Assignee: —
•
Filing: —
•
Granted: 1962-06-26
•
Expires: 1979-06-26
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:53
CPC Classifications
C; C07; C07D; C07D473/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 6-(2-PYRIDYL METHYLAMINO)-PURINE, 6-(3-PYRIDYL METHYLAMINO)-PURINE, AND 6-(4-PYRIDYL METHYLAMINO)-PURINE.
Claim 2
Dependent Claim
15 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 6-(2-PYRIDYL METHYLAMINO)-PURINE, 6-(3-PYRIDYL METHYLAMINO)-PURINE, AND 6-(4-PYRIDYL METHYLAMINO)-PURINE.
References Cited (Backward Citations)
US2705715A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-25 | 1965-12-25 | 1966-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-25 | 1969-12-25 | 1970-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-25 | 1973-12-25 | 1974-06-26 | $7700.00 | Window Closed / Lapsed |