Patent US3203820A successfully refreshed from Google Patents.
US3203820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rheological agent
Assignee: Baker Castor Oil Co
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Filing: 1962-05-23
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Granted: 1965-08-31
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Expires: 1982-05-23
Abstract
No abstract record available.
Inventors
- 👤 Malcolm K Smith
- 👤 Temple C Patton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:53
CPC Classifications
C; C09; C09D; C09D7/00; C09D7/40; C09D7/43; C09D7/44; C08; C08K; C08K5/00; C08K5/16; C08K5/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
A RHEOLOGICAL AGENT CONSISTING ESSENTIALLY OF FINELY DIVIDED GLYCERYL TRIHYDROXYSTERATE AND FROM ABOUT 20% TO ABOUT 60% OF ETHYLENE DIAMIDE OF HYDRDOXYSTERIC ACID BASED UPON THE TOTAL WEIGHT OF THE AGENT.
Claim 2
Dependent Claim
31 words
A RHEOLOGICAL AGENT CONSISTING ESSENTIALLY OF FINELY DIVIDED GLYCERYL TRIHYDROXYSTERATE AND FROM ABOUT 20% TO ABOUT 60% OF ETHYLENE DIAMIDE OF HYDRDOXYSTERIC ACID BASED UPON THE TOTAL WEIGHT OF THE AGENT.
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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |