US2692857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Noncorrosive graphite emulsions
Assignee: Individual
•
Filing: 1951-01-19
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Granted: 1954-10-26
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Expires: 1971-01-19
Abstract
No abstract record available.
Inventors
- 👤 Josef M Michel
- 👤 Karl F Hager
- 👤 Rosenthal Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:51
CPC Classifications
C; C10; C10M; C10M173/00; C10M173/02; C10M2201/00; C10M2201/02; C10M2201/04; C10M2201/041; C10M2201/042; C10M2219/00; C10M2219/04; C10M2219/044; C10N; C10N2050/00; C10N2050/01
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
80 words
A COMPOSITION OF MATTER COMPRISING WATER AS A DISPERSING AND SOLVENT MEDIUM, GRAPHITE COLLOIDALLY SUSPENDED IN THE WATER, AND A MINOR CORROSION INHIBITING AMOUNT OF A DISSOLVED COMPOUND OF THE FORMULA @SP RI-SO2-NH-R2 @SP WHERE R1 REPRESENTS A SATURATED ALIPHATIC HYDROCARBON RADICAL WITH A CHAIN LENGTH OF BETWEEN EIGHT AND TWENTY-FOUR CARBON ATOMS AND R2 REPRESENTED A MEMBER CHOSEN FROM THE GROUP CONSISTING OF ALIPHATIC AND AROMATIC CARBOXYLIC ACID RADICALS OF LOW MOLECULAR WEIGHT AND THE WATER SOLUBLE SALTS THEREOF.
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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) | 1957-10-25 | 1958-04-26 | 1958-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-25 | 1962-04-26 | 1962-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-25 | 1966-04-26 | 1966-10-26 | $7700.00 | Window Closed / Lapsed |