Patent US2500582A successfully refreshed from Google Patents.
US2500582A
Expired / Lapsed
US
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Beta-aryloxy aldehydes and preparation of the same
Assignee: Shell Development Co
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Filing: 1947-03-25
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Granted: 1950-03-14
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Expires: 1967-03-25
Abstract
No abstract record available.
Inventors
- 👤 Curtis W Smith
- 👤 Seaver A Ballard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:12
CPC Classifications
C; C07; C07C; C07C47/00; C07C47/20; C07C47/277; C07C45/00; C07C45/61; C07C45/67; C07C45/68; C07C45/70; C07C45/71; C07C49/00; C07C49/20; C07C49/258
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
58 words
THE METHOD OF PREPARING A 3-PHENOXY ALKANOL COMPRISING HEATING IN THE LIQUID STATE AT A REACTION TEMPERATURE BETWEEN ABOUT 50*C. AND ABOUT 200*C. A MIXTURE COMPRISING PHENOL, A 2-ALKENAL, AND FROM ABOUT 0.02 TO ABOUT 5 PER CENT OF A POLYMERIZATION INHIBITOR BASED UPON THE WEIGHT OF THE 2-ALKENAL, AND RECOVERING SAID 3-PHENOXY ALKANAL FROM THE RESULTANT MIXTURE.
Claim 2
Independent Claim
58 words
THE METHOD OF PREPARING A 3-PHENOXY ALKANOL COMPRISING HEATING IN THE LIQUID STATE AT A REACTION TEMPERATURE BETWEEN ABOUT 50*C. AND ABOUT 200*C. A MIXTURE COMPRISING PHENOL, A 2-ALKENAL, AND FROM ABOUT 0.02 TO ABOUT 5 PER CENT OF A POLYMERIZATION INHIBITOR BASED UPON THE WEIGHT OF THE 2-ALKENAL, AND RECOVERING SAID 3-PHENOXY ALKANAL FROM THE RESULTANT MIXTURE.
Claim 3
Independent Claim
94 words
THE METHOD OF PREPARING A 3-ARYLOXY ALKANAL COMPRISING HEATING IN THE LIQUID STATE AT A REACTION TEMPERATURE BETWEEN ABOUT 50*C. AND ABOUT 200*C. A MIXTURE COMPRISING A 2ALKENAL AND A PHENOL PRESENT IN MOLAR PROPORTIONS OF FROM ABOUT 0.5 MOLE TO ABOUT 6 MOLES OF THE PHENOL PER MOLE OF THE 2-ALKENAL, SAID MIXTURE CONTAINING A POLYMERIZATION INHIBITOR IN AN AMOUNT FROM ABOUT 0.02 TO ABOUT 5 PER CENT BY WEIGHT OF THE 2-ALKENAL, SEPARATING UNREACTED PHENOL FROM THE RESULTANT MIXTURE, AND DISTILLING THE RESIDUAL PORTION OF THE MIXTURE TO RECOVER THE 3-ARYLOXY ALKANAL.
Claim 4
Independent Claim
94 words
THE METHOD OF PREPARING A 3-ARYLOXY ALKANAL COMPRISING HEATING IN THE LIQUID STATE AT A REACTION TEMPERATURE BETWEEN ABOUT 50*C. AND ABOUT 200*C. A MIXTURE COMPRISING A 2ALKENAL AND A PHENOL PRESENT IN MOLAR PROPORTIONS OF FROM ABOUT 0.5 MOLE TO ABOUT 6 MOLES OF THE PHENOL PER MOLE OF THE 2-ALKENAL, SAID MIXTURE CONTAINING A POLYMERIZATION INHIBITOR IN AN AMOUNT FROM ABOUT 0.02 TO ABOUT 5 PER CENT BY WEIGHT OF THE 2-ALKENAL, SEPARATING UNREACTED PHENOL FROM THE RESULTANT MIXTURE, AND DISTILLING THE RESIDUAL PORTION OF THE MIXTURE TO RECOVER THE 3-ARYLOXY ALKANAL.
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) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |