US2398347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material for sealing off porous formations in wells
Assignee: Halliburton Oil Well Cementing Co
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Filing: 1944-06-17
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Granted: 1946-04-16
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Expires: 1964-06-17
Abstract
No abstract record available.
Inventors
- 👤 Francis M Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:07
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/03; C09K8/035; C04; C04B; C04B28/00; C04B28/02; C09K8/42; C09K8/46; C09K8/467; C09K8/50; C09K8/504; C09K8/506; C09K8/508; C09K8/514; C09K8/516; E; E21; E21B; E21B21/00; E21B21/003; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
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) | 1949-04-15 | 1949-10-15 | 1950-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-04-15 | 1953-10-15 | 1954-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-04-15 | 1957-10-15 | 1958-04-16 | $7700.00 | Window Closed / Lapsed |