Patent US2562848A successfully refreshed from Google Patents.
US2562848A
Expired / Lapsed
US
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Preparation of 6-amino 2-hydroxy carboxylic acid compounds
Assignee: Shell Development Co
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Filing: 1949-01-24
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Granted: 1951-07-31
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Expires: 1969-01-24
Abstract
No abstract record available.
Inventors
- 👤 Richard R Whetstone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:40
CPC Classifications
C; C07; C07D; C07D309/00; C07D309/16; C07D309/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
A PROCESS WHICH COMPRISES REACTING 7-OXO6,8-DIOXABICYCLO(3.2.1)OCTANE WITH AMMONIA AND WITH HYDROGEN IN THE PRESENCE OF A HYDROGENATION CATALYST TO PRODUCE AN EPSILON-AMINO-ALPHA-HYDROXYCAPROIC ACID COMPOUND.
Claim 2
Dependent Claim
24 words
A PROCESS WHICH COMPRISES REACTING 7-OXO6,8-DIOXABICYCLO(3.2.1)OCTANE WITH AMMONIA AND WITH HYDROGEN IN THE PRESENCE OF A HYDROGENATION CATALYST TO PRODUCE AN EPSILON-AMINO-ALPHA-HYDROXYCAPROIC ACID COMPOUND.
References Cited (Backward Citations)
US2511890A
Cited
US2350370A
Cited
US2389099A
Cited
US2446651A
Cited
US2461847A
Cited
US2514156A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-30 | 1955-01-29 | 1955-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-30 | 1959-01-29 | 1959-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-30 | 1963-01-29 | 1963-07-31 | $7700.00 | Window Closed / Lapsed |