US2744903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehydrogenation process
Assignee: Rohm and Haas Co
•
Filing: 1953-02-18
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Granted: 1956-05-08
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Expires: 1973-02-18
Abstract
No abstract record available.
Inventors
- 👤 Fred E Boettner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:54
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C07D213/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A PROCESS FOR PREPARING METHYL PYRIDINES WHICH COMPRISES HEATING BETWEEN 100* AND 500* C. IN THE PRESENCE OF A DEHYDROGENATING CATALYST THE BASIC CONDENSATION PRODUCTS OF ISOBUTYLENE, FORMALDEHYDE, AND A MEMBER OF THE CLASS CONSISTING OF AMMONIA AND METHYLAMINE, SAID PRODUCTS BEING FORMED IN THE PRESENCE OF HYDROGEN CHLORIDE.
Claim 2
Dependent Claim
49 words
A PROCESS FOR PREPARING METHYL PYRIDINES WHICH COMPRISES HEATING BETWEEN 100* AND 500* C. IN THE PRESENCE OF A DEHYDROGENATING CATALYST THE BASIC CONDENSATION PRODUCTS OF ISOBUTYLENE, FORMALDEHYDE, AND A MEMBER OF THE CLASS CONSISTING OF AMMONIA AND METHYLAMINE, SAID PRODUCTS BEING FORMED IN THE PRESENCE OF HYDROGEN CHLORIDE.
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) | 1959-05-08 | 1959-11-07 | 1960-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-08 | 1963-11-07 | 1964-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-08 | 1967-11-07 | 1968-05-08 | $7700.00 | Window Closed / Lapsed |