Patent US2534239A successfully refreshed from Google Patents.
US2534239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
B-haloxanthine
Assignee: —
•
Filing: —
•
Granted: 1950-12-19
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Expires: 1967-12-19
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:30
CPC Classifications
C; C07; C07D; C07D473/00; C07D473/02; C07D473/04; C07D473/06; C07D473/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
AN 8-HALOXANTHINE SALT OF AN ORGANIC BASE OF THE FORMULA (C6H5)2CH-ALK-B WHEREIN ALK IS A LOWER ALKLENE RADICAL AND B IS A TERTIARY AMINO RADICAL OF THE GROUP CONSISTING OF DI(LOWER ALKYL) AMINO AND SIX-MEMBERED SATURATED HETEROCYCLIC RADICALS WHEREIN NITROGEN IS THE SOLE HETERO ELEMENT AND THE HETEROCYCLIC AMINO RADICAL IS LINKED TO ALK THROUGH NITROGEN, AND WHEREIN THE 8-HALOXANTHINE CONTAINS A HYDROGEN ATOM IN POSITION 7.
Claim 2
Dependent Claim
67 words
AN 8-HALOXANTHINE SALT OF AN ORGANIC BASE OF THE FORMULA (C6H5)2CH-ALK-B WHEREIN ALK IS A LOWER ALKLENE RADICAL AND B IS A TERTIARY AMINO RADICAL OF THE GROUP CONSISTING OF DI(LOWER ALKYL) AMINO AND SIX-MEMBERED SATURATED HETEROCYCLIC RADICALS WHEREIN NITROGEN IS THE SOLE HETERO ELEMENT AND THE HETEROCYCLIC AMINO RADICAL IS LINKED TO ALK THROUGH NITROGEN, AND WHEREIN THE 8-HALOXANTHINE CONTAINS A HYDROGEN ATOM IN POSITION 7.
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) | 1953-12-18 | 1954-06-19 | 1954-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-18 | 1958-06-19 | 1958-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-18 | 1962-06-19 | 1962-12-19 | $7700.00 | Window Closed / Lapsed |