Patent US2943679A successfully refreshed from Google Patents.
US2943679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well-servicing compositions and methods
Assignee: Pan American Petroleum Corp
•
Filing: 1955-07-15
•
Granted: 1960-07-05
•
Expires: 1975-07-15
Abstract
No abstract record available.
Inventors
- 👤 Jr Platho P Scott
- 👤 Alfred O Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:36
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/03; C09K8/04; C09K8/14; C09K8/16; E; E21; E21B; E21B21/00; E21B21/003; C09K2208/00; C09K2208/18
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2319182A
Cited
US2351434A
Cited
US2398347A
Cited
US2502191A
Cited
US2561075A
Cited
US2815079A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |