Patent DE621684C successfully refreshed from Google Patents.
US2779735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low fluid loss composition
Assignee: ConocoPhillips Co
•
Filing: 1956-04-18
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Granted: 1957-01-29
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Expires: 1976-04-18
Abstract
No abstract record available.
Inventors
- 👤 Jack L Brown
- 👤 Mary M Landers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:13
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/62; C09K8/64; Y; Y10; Y10S; Y10S507/00; Y10S507/922
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A LOW LIQUID LOSS COMPOSITION COMPRISING: A MAJOR PORTION OF PETROLEUM OIL HAVING DISPERSED THEREIN; A MINOR AMOUNT OF OIL-INSOLUBLE FINELY DIVIDED SOLIDS OF SUCH FINENESS AS TO PROVIDE AT LEAST ABOUT .0025 POUND PER GALLON OF OIL PARTICLES VARYING IN SIZE FROM ABOUT 0.005 TO
Claim 2
Dependent Claim
46 words
A LOW LIQUID LOSS COMPOSITION COMPRISING: A MAJOR PORTION OF PETROLEUM OIL HAVING DISPERSED THEREIN; A MINOR AMOUNT OF OIL-INSOLUBLE FINELY DIVIDED SOLIDS OF SUCH FINENESS AS TO PROVIDE AT LEAST ABOUT .0025 POUND PER GALLON OF OIL PARTICLES VARYING IN SIZE FROM ABOUT 0.005 TO
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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) | 1960-01-29 | 1960-07-30 | 1961-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-29 | 1964-07-30 | 1965-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-29 | 1968-07-30 | 1969-01-29 | $7700.00 | Window Closed / Lapsed |