US2502606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reacting blown nondehydrated castor oil with maleic anhydride, products, and compositions thereof
Assignee: Individual
•
Filing: 1946-03-05
•
Granted: 1950-04-04
•
Expires: 1966-03-05
Abstract
No abstract record available.
Inventors
- 👤 Ullmann Rachel Mifflin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:46
CPC Classifications
C; C09; C09D; C09D101/00; C09D101/08; C09D101/16; C09D101/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A MODIFIED CASTOR OIL CONSISTING OF THE REACTION PRODUCT OF BLOWN CASTOR OIL STILL RETAINING THE HYDROXYL GROUPS CHARACTERISTIC OF RAW CASTOR OIL AND FROM 2 TO 20 PERCENT MALEIC ANHYDRIDE REACTED TOGETHER AT FROM 70* TO 140*C. FOR AT LEAST ONE HOUR, AND ESTERIFIED BY AN ALIPATIC ALCOHOL OF CARBON CHAIN LENGTH NOT OVER SEVEN.
Claim 2
Dependent Claim
56 words
A NITROCELLULOSE FORMULATION COMPRISING NITROCELLULOSE AND A PLASTICIZING AMOUNT OF THE REACTION PRODUCT OF BLOWN CASTOR OIL HAVING THE HYDROXYL GROUPS CHARACTERISTIC OF THE RAW OIL AND FROM 2 TO 20 PERCENT OF MALEIC ANHYDRIDE REACTED AT A TEMPERATURE OF 70* TO 140*C. FOR AT LEAST ONE HOUR, THE REACTION PRODUCT BEING INSOLUBLE IN MINERAL SPIRITS.
References Cited (Backward Citations)
GB405805A
Cited
US2196135A
Cited
US2058597A
Cited
US2188882A
Cited
US2188883A
Cited
US2275843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-03 | 1953-10-03 | 1954-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-03 | 1957-10-03 | 1958-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-03 | 1961-10-03 | 1962-04-04 | $7700.00 | Window Closed / Lapsed |