Patent US2745833A successfully refreshed from Google Patents.
US2745833A
Expired / Lapsed
US
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Production of substituted pyridiens
Assignee: Phillips Petroleum Co
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Filing: 1950-05-29
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Granted: 1956-05-15
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Expires: 1970-05-29
Abstract
No abstract record available.
Inventors
- 👤 Charles E Stoops
- 👤 Charles E Becker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:53
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C07D213/08; C07D213/09; C07D213/10; C07D213/12; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
THE PROCESS FOR PRODUCING PYRIDINE DERIVATIVES WHICH COMPRISES REACTING WITH AMMONIA A LOW-BOILING ALDEHYDE REACTIVE WITH AMMONIA TO PRODUCE PYRIDINE DERIVATIVES IN THE PRESENCE OF A SALT OF A FLUORINE-CONTAINING ACID AS A METAL PHOSPHATE GLASS.
Claim 2
Dependent Claim
36 words
THE PROCESS FOR PRODUCING PYRIDINE DERIVATIVES WHICH COMPRISES REACTING WITH AMMONIA A LOW-BOILING ALDEHYDE REACTIVE WITH AMMONIA TO PRODUCE PYRIDINE DERIVATIVES IN THE PRESENCE OF A SALT OF A FLUORINE-CONTAINING ACID AS A METAL PHOSPHATE GLASS.
References Cited (Backward Citations)
FR521891A
Cited
DE349184C
Cited
GB230063A
Cited
US1636701A
Cited
GB394689A
Cited
US2523580A
Cited
US2520097A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-15 | 1959-11-14 | 1960-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-15 | 1963-11-14 | 1964-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-15 | 1967-11-14 | 1968-05-15 | $7700.00 | Window Closed / Lapsed |