US2664446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aldal condensation
Assignee: Imperial Chemical Industries Ltd
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Filing: 1950-06-14
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Granted: 1953-12-29
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Expires: 1970-06-14
Abstract
No abstract record available.
Inventors
- 👤 Charlton Francis Richard
- 👤 Dowden Dennis Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:36
CPC Classifications
C; C07; C07C; C07C49/00; C07C49/04; C07C49/17; C07C45/00; C07C45/61; C07C45/67; C07C45/68; C07C45/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A CONTINUOUS PROCESS FOR THE PRODUCTION OF ALDOL CONDENSATION PRODUCTS WHICH COMPRISES BRINGING A CARBONYL COMPOUND INTO CONTACT IN THE LIQUID PHASE AT A MODERATE TEMPERATURE WITH A CATALYST COMPRISING A CALCIUM COMPOUND SELECTED FROM CALCIUM OXIDE CALCIUM HYDROXIDE, HYDROUS CALCIUM OXIDE AND HYDROUS CALCIUM HYDROXIDE, SUPPORTED ON GRANULES OF A LITHIA-ALUMINA COMPLEX ANALOGOUS TO SODIUM BETA-ALUMINA AND TO THE SPINELS WITH A DEFECTIVE LATTICE.
Claim 2
Dependent Claim
65 words
A CONTINUOUS PROCESS FOR THE PRODUCTION OF ALDOL CONDENSATION PRODUCTS WHICH COMPRISES BRINGING A CARBONYL COMPOUND INTO CONTACT IN THE LIQUID PHASE AT A MODERATE TEMPERATURE WITH A CATALYST COMPRISING A CALCIUM COMPOUND SELECTED FROM CALCIUM OXIDE CALCIUM HYDROXIDE, HYDROUS CALCIUM OXIDE AND HYDROUS CALCIUM HYDROXIDE, SUPPORTED ON GRANULES OF A LITHIA-ALUMINA COMPLEX ANALOGOUS TO SODIUM BETA-ALUMINA AND TO THE SPINELS WITH A DEFECTIVE LATTICE.
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) | 1956-12-28 | 1957-06-29 | 1957-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-28 | 1961-06-29 | 1961-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-28 | 1965-06-29 | 1965-12-29 | $7700.00 | Window Closed / Lapsed |