US3091610A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfa compounds and processes
Assignee: F Hoffmann La Roche AG
•
Filing: 1960-11-08
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Granted: 1963-05-28
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Expires: 1980-11-08
Abstract
No abstract record available.
Inventors
- 👤 Bretschneider Hermann
- 👤 Klotzer Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:03
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/28; C07D239/32; C07D239/34; C07D239/46; C07D239/60; C07D239/69
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
5 words
2-LOWER ALKOXY -4- (N4-LOWER ALKANOYL-SULFANILAMIDO)-6-HALO-PYRIMIDINE.
Claim 2
Dependent Claim
5 words
2-LOWER ALKOXY -4- (N4-LOWER ALKANOYL-SULFANILAMIDO)-6-HALO-PYRIMIDINE.
Claim 3
Dependent Claim
44 words
A PROCESS COMPRISING THE STEPS OF REACTING 2-LOWER ALKOXY-4,6-DIHALO-PYRIMIDINE WITH AN APPROXIMATELY 2 MOLAR PROPORTION OF AN ALKALI METAL SALT OF SULFANILAMIDE AT A TEMPERATURE IN THE RANGE OF ABOUT 80* TO ABOUT 120* C., AND RECOVERING 2-LOWER ALKOXY-4-SULFANILAMIDO-6-HALOPYRIMIDINE FROM THE RESULTING REACTION MIXTURE.
Claim 4
Dependent Claim
44 words
A PROCESS COMPRISING THE STEPS OF REACTING 2-LOWER ALKOXY-4,6-DIHALO-PYRIMIDINE WITH AN APPROXIMATELY 2 MOLAR PROPORTION OF AN ALKALI METAL SALT OF SULFANILAMIDE AT A TEMPERATURE IN THE RANGE OF ABOUT 80* TO ABOUT 120* C., AND RECOVERING 2-LOWER ALKOXY-4-SULFANILAMIDO-6-HALOPYRIMIDINE FROM THE RESULTING REACTION MIXTURE.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-27 | 1966-11-26 | 1967-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-27 | 1970-11-26 | 1971-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-27 | 1974-11-26 | 1975-05-28 | $7700.00 | Window Closed / Lapsed |