Patent US2493500A successfully refreshed from Google Patents.
Patent US2729643A successfully refreshed from Google Patents.
US2729643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
J-disubstmjied and i
Assignee: —
•
Filing: —
•
Granted: 1956-01-03
•
Expires: 1973-01-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:18
CPC Classifications
C; C07; C07D; C07D473/00; C07D473/02; C07D473/04; C07D473/06; C07D473/08; A; A61; A61K; A61K31/00; A61K31/33; A61K31/395; A61K31/495; A61K31/505; A61K31/519; A61K31/52; A61K31/522
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
XANTHINE DERIVATIVES CORRESPONDING TO THE FORMULA: WHEREIN EACH OF R1, R2 AND R3 REPRESENTS A MEMBER SELECTED FROM THE GROUP CONSISTING OF LOWER ALKYL AND ALLYL, R4 REPRESENTS A MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND LOWER ALKYL, R3 AND R4 TOGETHER WITH THE NITROGEN ATOM REPRESENT A MEMBER SELECTED FROM THE GROUP CONSISTING OF AN ALKYLENE IMINO RADICAL WITH 5 TO 6 RING MEMBERS AND THE MORPHOLINO RADICAL, R5 REPRESENTS A MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND LOWER ALKYL, AND X REPRESENTS A MEMBER SELECTED FROM THE GROUP CONSISTING OF OXYGEN AND SULPHUR.
Claim 2
Dependent Claim
99 words
XANTHINE DERIVATIVES CORRESPONDING TO THE FORMULA: WHEREIN EACH OF R1, R2 AND R3 REPRESENTS A MEMBER SELECTED FROM THE GROUP CONSISTING OF LOWER ALKYL AND ALLYL, R4 REPRESENTS A MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND LOWER ALKYL, R3 AND R4 TOGETHER WITH THE NITROGEN ATOM REPRESENT A MEMBER SELECTED FROM THE GROUP CONSISTING OF AN ALKYLENE IMINO RADICAL WITH 5 TO 6 RING MEMBERS AND THE MORPHOLINO RADICAL, R5 REPRESENTS A MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND LOWER ALKYL, AND X REPRESENTS A MEMBER SELECTED FROM THE GROUP CONSISTING OF OXYGEN AND SULPHUR.
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) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |