US2497882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refined rosin products and processes
Assignee: Akzo Nobel Paints LLC
•
Filing: 1946-02-23
•
Granted: 1950-02-21
•
Expires: 1966-02-23
Abstract
No abstract record available.
Inventors
- 👤 Burt L Hampton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:04
CPC Classifications
C; C11; C11D; C11D15/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
THE PROCESS OF PRODUCING AN IMPROVED ROSIN COMPOSITION CHARACTERIZED BY IMPARTING AN INCREASED RESISTANCE TO YELLOWING IN SOAPS AND SIZES MADE THEREFROM, WHICH PROCESS CONSISTS OF HEATING A ROSIN MATERIAL UNDER NON-OXIDIZING CONDITIONS WITH FROM 0.5% TO 5% IN SULFUR EQUIVALENT OF AT LEAST ONE CATALYTIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF SULFUR, SULFUR HALIDES, ALKALI METAL SULFIDES AND ALKALI METAL POLYSULFIDES, IN THE PRESENCE OF A SMALL PERCENTAGE UP TO ABOUT 38% OF THE STOICHIOMETRIC QUANTITY OF AN ALKALI METAL ALKALI REQUIRED TO NEUTRALIZE THE ROSIN MATERIAL, AT A TEMPERATURE BETWEEN ABOUT 200*C. AND 375*C. FOR A TIME SUFFICIENT TO DECREASE THE DEGREE OF UNSATURATION WITHOUT AROMATIZATION OF SUBSTANTIALLY MORE THAN ONE RING OF THE ROSIN MATERIAL.
Claim 2
Dependent Claim
119 words
THE PROCESS OF PRODUCING AN IMPROVED ROSIN COMPOSITION CHARACTERIZED BY IMPARTING AN INCREASED RESISTANCE TO YELLOWING IN SOAPS AND SIZES MADE THEREFROM, WHICH PROCESS CONSISTS OF HEATING A ROSIN MATERIAL UNDER NON-OXIDIZING CONDITIONS WITH FROM 0.5% TO 5% IN SULFUR EQUIVALENT OF AT LEAST ONE CATALYTIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF SULFUR, SULFUR HALIDES, ALKALI METAL SULFIDES AND ALKALI METAL POLYSULFIDES, IN THE PRESENCE OF A SMALL PERCENTAGE UP TO ABOUT 38% OF THE STOICHIOMETRIC QUANTITY OF AN ALKALI METAL ALKALI REQUIRED TO NEUTRALIZE THE ROSIN MATERIAL, AT A TEMPERATURE BETWEEN ABOUT 200*C. AND 375*C. FOR A TIME SUFFICIENT TO DECREASE THE DEGREE OF UNSATURATION WITHOUT AROMATIZATION OF SUBSTANTIALLY MORE THAN ONE RING OF THE ROSIN MATERIAL.
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) | 1953-02-20 | 1953-08-22 | 1954-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-20 | 1957-08-22 | 1958-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-20 | 1961-08-22 | 1962-02-21 | $7700.00 | Window Closed / Lapsed |