Patent US2896273A successfully refreshed from Google Patents.
Patent US2903443A successfully refreshed from Google Patents.
US2903443A
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Process for the preparation of amino-ketoses and products obtained thereby
Assignee: CIBA PHARM PROD Inc
•
Filing: 1957-01-14
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Granted: 1959-09-08
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Expires: 1977-01-14
Abstract
No abstract record available.
Inventors
- 👤 Druey Jean
- 👤 Huber Georg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:26
CPC Classifications
C; C07; C07H; C07H5/00; C07H5/04; C07H5/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
19 words
IN A PROCESS FOR THE PREPARATION OF 1-AMINO-KETOSES, THE STEP WHICH COMPRISES REACTING A 1-(N:N-BIS-ARYLMETHYL-AMINO)-2-KETOSE WITH A HYDROGENATING AGENT.
Claim 2
Dependent Claim
19 words
IN A PROCESS FOR THE PREPARATION OF 1-AMINO-KETOSES, THE STEP WHICH COMPRISES REACTING A 1-(N:N-BIS-ARYLMETHYL-AMINO)-2-KETOSE WITH A HYDROGENATING AGENT.
Claim 3
Dependent Claim
2 words
ACETYLATED 1-AMINO-2-KETOSES.
Claim 4
Dependent Claim
2 words
ACETYLATED 1-AMINO-2-KETOSES.
References Cited (Backward Citations)
US2715123A
Cited
US2792388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |