Patent US4431743A successfully refreshed from Google Patents.
Patent US2968681A successfully refreshed from Google Patents.
US2968681A
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Method of preparing hydrogenated binaphthyls
Assignee: Union Carbide Corp
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Filing: 1959-02-17
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Granted: 1961-01-17
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Expires: 1979-02-17
Abstract
No abstract record available.
Inventors
- 👤 George L O'connor
- 👤 Henry E Fritz
- 👤 Marion A Eccles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:00
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/01; C07; C07C; C07C2/00; C07C2/74; C07C2523/00; C07C2523/02; C07C2523/04; C07C2602/00; C07C2602/02; C07C2602/04; C07C2602/10; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/93; Y10S585/935
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A PROCESS FOR THE PRODUCTION OF 1,2,3,4-TETRAHYDROBINAPHTHYL AND 1,1'',2,2'',3,3'',4,4'' - OCTAHYDROBINAPHTHYL WHICH COMPRISES HYDROGENATING NAPHTHALENE AT A TEMPERATURE OF AT LEAST ABOUT 150*C., UNDER A HYDROGEN PRESSURE OF AT LEAST ABOUT 500 P.S.I.G., IN THE PRESENCE OF AT LEAST ABOUT 0.03 PERCENT BY WEIGHT OF METALLIC POTASSIUM BASED UPON THE WEIGHT OF NAPHTHALENE, AND RECOVERING THE 1,2,3,4-TETRAHYDROBINAPHTHYL AND 1,1'',2,2'',3,3'',4,4''-OCTAHYDROBINAPHTHYL THEREBY FORMED FROM THE CRUDE REACTION PRODUCT.
Claim 2
Dependent Claim
66 words
A PROCESS FOR THE PRODUCTION OF 1,2,3,4-TETRAHYDROBINAPHTHYL AND 1,1'',2,2'',3,3'',4,4'' - OCTAHYDROBINAPHTHYL WHICH COMPRISES HYDROGENATING NAPHTHALENE AT A TEMPERATURE OF AT LEAST ABOUT 150*C., UNDER A HYDROGEN PRESSURE OF AT LEAST ABOUT 500 P.S.I.G., IN THE PRESENCE OF AT LEAST ABOUT 0.03 PERCENT BY WEIGHT OF METALLIC POTASSIUM BASED UPON THE WEIGHT OF NAPHTHALENE, AND RECOVERING THE 1,2,3,4-TETRAHYDROBINAPHTHYL AND 1,1'',2,2'',3,3'',4,4''-OCTAHYDROBINAPHTHYL THEREBY FORMED FROM THE CRUDE REACTION PRODUCT.
References Cited (Backward Citations)
US2478205A
Cited
US1898966A
Cited
US2021567A
Cited
GB425363A
Cited
US2481921A
Cited
US2473997A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-17 | 1964-07-18 | 1965-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-17 | 1968-07-18 | 1969-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-17 | 1972-07-18 | 1973-01-17 | $7700.00 | Window Closed / Lapsed |