US2720514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rosin condensates and their preparation
Assignee: Hercules Powder Co
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Filing: 1951-12-29
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Granted: 1955-10-11
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Expires: 1971-12-29
Abstract
No abstract record available.
Inventors
- 👤 Alfred L Rummelsburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:15
CPC Classifications
C; C08; C08G; C08G16/00; C08G16/02; C08G16/0293
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
THE PROCESS OF PRODUCING A RESINOUS CONDENSATION PRODUCT WHICH COMPRISES SUBJECTING A MATERIAL CONTAINING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ROSIN ACIDS, ESTERS OF ROSIN ACIDS, ALCOHOLS PRODUCED BY THE REDUCTION OF THE CARBOXYL GROUP OF A ROSIN ACID AND ESTERS OF SAID ALCOHOLS TO TREATMENT WITH A COMPOUND OF THE GROUP CONSISTING OF ALDEHYDES AND ALDEHYDE POLYMERS IN THE PRESENCE OF AN ACIDIC SILICEOUS CLAY CATALYST AT A TEMPERATURE AT ABOUT 60* TO 300* C.
Claim 2
Dependent Claim
78 words
THE PROCESS OF PRODUCING A RESINOUS CONDENSATION PRODUCT WHICH COMPRISES SUBJECTING A MATERIAL CONTAINING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ROSIN ACIDS, ESTERS OF ROSIN ACIDS, ALCOHOLS PRODUCED BY THE REDUCTION OF THE CARBOXYL GROUP OF A ROSIN ACID AND ESTERS OF SAID ALCOHOLS TO TREATMENT WITH A COMPOUND OF THE GROUP CONSISTING OF ALDEHYDES AND ALDEHYDE POLYMERS IN THE PRESENCE OF AN ACIDIC SILICEOUS CLAY CATALYST AT A TEMPERATURE AT ABOUT 60* TO 300* C.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-10 | 1959-04-11 | 1959-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-10 | 1963-04-11 | 1963-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-10 | 1967-04-11 | 1967-10-11 | $7700.00 | Window Closed / Lapsed |