US2707997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods and apparatus for sealing a bore hole casing
Assignee: ZANDMER
•
Filing: 1952-04-30
•
Granted: 1955-05-10
•
Expires: 1972-04-30
Abstract
No abstract record available.
Inventors
- 👤 Zandmer Solis Myron
- 👤 Jacobs Albert Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:35
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/11; E21B33/00; E21B33/10; E21B33/13; E21B33/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2196652A
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US2186349A
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US2201290A
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US2295418A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-09 | 1958-11-08 | 1959-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-09 | 1962-11-08 | 1963-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-09 | 1966-11-08 | 1967-05-10 | $7700.00 | Window Closed / Lapsed |