Patent US2213039A successfully refreshed from Google Patents.
US2213039A
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US
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Water shut-off method and composition for wells
Assignee: Individual
•
Filing: 1938-11-14
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Granted: 1940-08-27
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Expires: 1958-11-14
Abstract
No abstract record available.
Inventors
- 👤 Vern W David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:10
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/10; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/145; E; E21; E21B; E21B33/00; E21B33/10; E21B33/13; E21B33/138; Y; Y10; Y10S; Y10S106/00; Y10S106/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-08-27 | 1944-02-26 | 1944-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-08-27 | 1948-02-26 | 1948-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-08-27 | 1952-02-26 | 1952-08-27 | $7700.00 | Window Closed / Lapsed |