US2591807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil well cementing
Assignee: Individual
•
Filing: 1947-08-23
•
Granted: 1952-04-08
•
Expires: 1967-08-23
Abstract
No abstract record available.
Inventors
- 👤 Haskell M Greene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:00
CPC Classifications
E; E21; E21B; E21B27/00; E21B27/02; E21B33/00; E21B33/10; E21B33/13; E21B33/134; E21B43/00; E21B43/11; E21B43/116
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1734670A
Cited
US1588643A
Cited
US1594448A
Cited
USRE21356E
Cited
US2307729A
Cited
US2381929A
Cited
US2418486A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-08 | 1955-10-08 | 1956-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-08 | 1959-10-08 | 1960-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-08 | 1963-10-08 | 1964-04-08 | $7700.00 | Window Closed / Lapsed |