US2572035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic tall oil rosin fraction
Assignee: General Mills Inc
•
Filing: 1948-08-14
•
Granted: 1951-10-23
•
Expires: 1968-08-14
Abstract
No abstract record available.
Inventors
- 👤 Wesley A Jordan
- 👤 Melvin S Herban
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:07
CPC Classifications
C; C09; C09F; C09F1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A PARTIALLY ESTERIFIED TALL OIL ROSIN FRACTION, SAID FRACTION CONTAINING ROSIN ACIDS IN THE APPROXIMATE RANGE OF 65-75% AND FATTY ACIDS WITHIN THE RANGE OF 25-35%, SAID FRACTION BEING ESTERFIED WITH A POLYHYDRIC ALCOHOL TO THE EXTENT THAT ITS ACID NUMBER IS REDUCED FROM 25% TO 50%.
Claim 2
Dependent Claim
47 words
A PARTIALLY ESTERIFIED TALL OIL ROSIN FRACTION, SAID FRACTION CONTAINING ROSIN ACIDS IN THE APPROXIMATE RANGE OF 65-75% AND FATTY ACIDS WITHIN THE RANGE OF 25-35%, SAID FRACTION BEING ESTERFIED WITH A POLYHYDRIC ALCOHOL TO THE EXTENT THAT ITS ACID NUMBER IS REDUCED FROM 25% TO 50%.
References Cited (Backward Citations)
US2270947A
Cited
US2432333A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-22 | 1955-04-23 | 1955-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-22 | 1959-04-23 | 1959-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-22 | 1963-04-23 | 1963-10-23 | $7700.00 | Window Closed / Lapsed |