Patent US2584768A successfully refreshed from Google Patents.
US2584768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling fluid
Assignee: Texaco Development Corp
•
Filing: 1949-07-20
•
Granted: 1952-02-05
•
Expires: 1969-07-20
Abstract
No abstract record available.
Inventors
- 👤 Walter J Weiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:41
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/16
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2235955A
Cited
US2324124A
Cited
US2370472A
Cited
US2294877A
Cited
US2365489A
Cited
US2414647A
Cited
US2417307A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-04 | 1955-08-06 | 1956-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-04 | 1959-08-06 | 1960-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-04 | 1963-08-06 | 1964-02-05 | $7700.00 | Window Closed / Lapsed |