US2606618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well packer
Assignee: Page Oil Tools Inc
•
Filing: 1949-01-07
•
Granted: 1952-08-12
•
Expires: 1969-01-07
Abstract
No abstract record available.
Inventors
- 👤 John S Page
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:41
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/126
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2178540A
Cited
US2352700A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-12 | 1956-02-11 | 1956-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-12 | 1960-02-11 | 1960-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-12 | 1964-02-11 | 1964-08-12 | $7700.00 | Window Closed / Lapsed |