Patent US3322668A successfully refreshed from Google Patents.
US3322668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling fluids and additive therefor
Assignee: International Minerals and Chemical Corp
•
Filing: 1962-10-22
•
Granted: 1967-05-30
•
Expires: 1982-10-22
Abstract
No abstract record available.
Inventors
- 👤 Ison G Fontenot
- 👤 Ernest F Snyder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:27
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/22
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
CA476310A
Cited
US2119732A
Cited
US2033509A
Cited
US2256886A
Cited
US2380156A
Cited
US2370911A
Cited
US2431891A
Cited
US2498301A
Cited
US2481374A
Cited
US2557647A
Cited
US2475485A
Cited
US2773670A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-29 | 1970-11-28 | 1971-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-29 | 1974-11-28 | 1975-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-29 | 1978-11-28 | 1979-05-30 | $7700.00 | Window Closed / Lapsed |