Patent US5535202A successfully refreshed from Google Patents.
Patent US4521889A successfully refreshed from Google Patents.
Patent US2686200A successfully refreshed from Google Patents.
US2686200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ester dialdehydes and acetals thereof
Assignee: Rohm and Haas Co
•
Filing: 1951-05-10
•
Granted: 1954-08-10
•
Expires: 1971-05-10
Abstract
No abstract record available.
Inventors
- 👤 Cicero Joseph C Lo
- 👤 Charles L Levesque
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:51
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/76; C07C69/80; C07C29/00; C07C29/132; C07C29/136; C07C29/14; C07C29/141; C07C45/00; C07C45/49; C07C45/50; C07C45/61; C07C45/67; C07C45/68; C07C45/72; C07C45/75; C07C47/00; C07C47/02; C07C47/20; C07C47/228
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
123 words
A PROCESS FOR PREPARING DIALDEHYDES HAVING AT LEAST TWO CARBOXYLIC ESTER LINKAGES IN THE PORTION OF TE MOLECULE SEPARATING THE ALDEHYDO GROUPS WHICH COMPRISES REACTING AT A PRESSURE ABOVE 100 POUNDS PER SQUARE INCH, AT A TEMPERATURE BETWEEN 80* AND 300* C., AND IN THE PRESENCE OF A COBALT CATALYST FROM THE CLASS CONSISTING OF ACTIVE COBALT METAL, COBALT CARBONYL, AND ORGANIC SOLVENT-SOLUBLE SALTS OF COBALT CARBON MONOXIDE, HYDROGEN, AND A COMPOUND HAVING TWO TERMINAL ALIPHATIC HYDROCARBON GROUPS EACH OF WHICH HAS AN OLEFINIC LINKAGE AND CONTAINS NOT OVER 18 CARBON ATOMS AND INTERMEDIATE SAID GROUPS A CHAIN CONTAINING A TOTAL OF NOT OVER 12 CARBON ATOMS, CONTAINING AT LEAST TWO CARBOXYLIC ESTER GROUPS, AND CONSISTING OF THE ELEMENTS CARBON, HYDROGEN, AND OXYGEN.
Claim 2
Dependent Claim
123 words
A PROCESS FOR PREPARING DIALDEHYDES HAVING AT LEAST TWO CARBOXYLIC ESTER LINKAGES IN THE PORTION OF TE MOLECULE SEPARATING THE ALDEHYDO GROUPS WHICH COMPRISES REACTING AT A PRESSURE ABOVE 100 POUNDS PER SQUARE INCH, AT A TEMPERATURE BETWEEN 80* AND 300* C., AND IN THE PRESENCE OF A COBALT CATALYST FROM THE CLASS CONSISTING OF ACTIVE COBALT METAL, COBALT CARBONYL, AND ORGANIC SOLVENT-SOLUBLE SALTS OF COBALT CARBON MONOXIDE, HYDROGEN, AND A COMPOUND HAVING TWO TERMINAL ALIPHATIC HYDROCARBON GROUPS EACH OF WHICH HAS AN OLEFINIC LINKAGE AND CONTAINS NOT OVER 18 CARBON ATOMS AND INTERMEDIATE SAID GROUPS A CHAIN CONTAINING A TOTAL OF NOT OVER 12 CARBON ATOMS, CONTAINING AT LEAST TWO CARBOXYLIC ESTER GROUPS, AND CONSISTING OF THE ELEMENTS CARBON, HYDROGEN, AND OXYGEN.
Claim 3
Dependent Claim
8 words
AS NEW CHEMICAL SUBSTANCES, COMPOUNDS OF THE FORMULA
Claim 4
Dependent Claim
8 words
AS NEW CHEMICAL SUBSTANCES, COMPOUNDS OF THE FORMULA
References Cited (Backward Citations)
GB614010A
Cited
US2491915A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-09 | 1958-02-08 | 1958-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-09 | 1962-02-08 | 1962-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-09 | 1966-02-08 | 1966-08-10 | $7700.00 | Window Closed / Lapsed |