US2688019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
6-aryl-2,4-diamino pyrimidines and process of preparing same
Assignee: SmithKline Beecham Corp
•
Filing: 1951-08-25
•
Granted: 1954-08-31
•
Expires: 1971-08-25
Abstract
No abstract record available.
Inventors
- 👤 George H Hitchings
- 👤 Russell Peter Byrom
- 👤 Elvira A Falco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:48
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/28; C07D239/32; C07D239/42; C07D239/46; C07D239/47; C07D239/48; C07D239/49
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
5 words
2,4 - DIAMINO-5-(6'' -BROMO-2'' -NAPHTHOXY)6-PHENYLPYRIMIDINE.
Claim 2
Dependent Claim
5 words
2,4 - DIAMINO-5-(6'' -BROMO-2'' -NAPHTHOXY)6-PHENYLPYRIMIDINE.
Claim 3
Independent Claim
8 words
A METHOD OF FORMING COMPOUNDS HAVING THE FORMULA
Claim 4
Independent Claim
8 words
A METHOD OF FORMING COMPOUNDS HAVING THE FORMULA
References Cited (Backward Citations)
US2211710A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-30 | 1958-03-01 | 1958-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-30 | 1962-03-01 | 1962-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-30 | 1966-03-01 | 1966-08-31 | $7700.00 | Window Closed / Lapsed |