Patent US3025292A successfully refreshed from Google Patents.
US3025292A
Expired / Lapsed
US
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Reduction of i
Assignee: —
•
Filing: —
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Granted: 1962-03-13
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Expires: 1979-03-13
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:06
CPC Classifications
C; C07; C07D; C07D285/00; C07D285/15; C07D285/16; C07D285/18; C07D285/20; C07D285/22; C07D285/24; C07D285/26; C07D285/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A PROCESS WHEREIN THE HETEROCYCLIC MOIETY OF 1,2,4 BENZOTHIADIAZINE-1,1-DIOXIDE IS REDUCED CATALYTICALLY IN THE PRESENCE OF RUTHENIUM AT A TEMPEREATURE BETWEEN ABOUT ROOM TEMPERATURE AND ABOUT50* C. AND AT A PRESSURE BETWEEN ABOUT 1 ATMOSPHERE TO ABOUT 100 ATMOSPHERE TO GIVE THE CORRESPONDING 3,4-DIHYDRO-1,2,J-BENZOTHIADIAZINE-1,1-DIOXIDE.
Claim 2
Dependent Claim
44 words
A PROCESS WHEREIN THE HETEROCYCLIC MOIETY OF 1,2,4 BENZOTHIADIAZINE-1,1-DIOXIDE IS REDUCED CATALYTICALLY IN THE PRESENCE OF RUTHENIUM AT A TEMPEREATURE BETWEEN ABOUT ROOM TEMPERATURE AND ABOUT50* C. AND AT A PRESSURE BETWEEN ABOUT 1 ATMOSPHERE TO ABOUT 100 ATMOSPHERE TO GIVE THE CORRESPONDING 3,4-DIHYDRO-1,2,J-BENZOTHIADIAZINE-1,1-DIOXIDE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-12 | 1965-09-11 | 1966-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-12 | 1969-09-11 | 1970-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-12 | 1973-09-11 | 1974-03-13 | $7700.00 | Window Closed / Lapsed |