US3429876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduction method of carbonyl group
Assignee: Shionogi and Co Ltd
•
Filing: 1965-02-12
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Granted: 1969-02-25
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Expires: 1985-02-12
Abstract
No abstract record available.
Inventors
- 👤 Wataru Nagata
- 👤 Hiroshi Itazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:09
CPC Classifications
C; C07; C07D; C07D217/00; C07B; C07B31/00; C07J; C07J1/00; C07J5/00; C07J7/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A METHOD FOR THE REDUCTION OF A COMPOUND CONTAINING A MEMBER SELECTED FROM THE GROUP CONSISTING OF =O, =N-H, =N-ALKYL=N-NH2, =N-CONH2 AND =N-CSNH2 CONNECTED TO A NUCLEAR CARBON ATOM, WHICH COMPRISES HEATING SAID COMPOUND AT 100-150*C. IN A MEMBER SELECTED FROM THE GROUP CONSISTING OF GLYCOLS, GLYCOL ETHERS AND MIXTURES THEREOF, EACH OF SAID GLYCOLS AND GLYCOL ETHERS BEING FREELY MISCIBLE WITH WATER, HAVING A BOILING POINT ABOVE 190*C., BEING LIQUID AT ROOM TEMPERATURE, CONTAINING 3 TO 10 CARBON ATOMS, AND CORRESPONDING TO THE FORMULA
Claim 2
Independent Claim
85 words
A METHOD FOR THE REDUCTION OF A COMPOUND CONTAINING A MEMBER SELECTED FROM THE GROUP CONSISTING OF =O, =N-H, =N-ALKYL=N-NH2, =N-CONH2 AND =N-CSNH2 CONNECTED TO A NUCLEAR CARBON ATOM, WHICH COMPRISES HEATING SAID COMPOUND AT 100-150*C. IN A MEMBER SELECTED FROM THE GROUP CONSISTING OF GLYCOLS, GLYCOL ETHERS AND MIXTURES THEREOF, EACH OF SAID GLYCOLS AND GLYCOL ETHERS BEING FREELY MISCIBLE WITH WATER, HAVING A BOILING POINT ABOVE 190*C., BEING LIQUID AT ROOM TEMPERATURE, CONTAINING 3 TO 10 CARBON ATOMS, AND CORRESPONDING TO THE FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |