US3045755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valved production packer
Assignee: Page Oil Tools Inc
•
Filing: 1958-04-07
•
Granted: 1962-07-24
•
Expires: 1978-04-07
Abstract
No abstract record available.
Inventors
- 👤 John S Page
- 👤 Jr John S Page
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:38
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/129; E21B33/1294
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2109351A
Cited
US2397472A
Cited
US2210815A
Cited
US2330509A
Cited
US2323989A
Cited
US2379079A
Cited
US2620036A
Cited
US2786534A
Cited
US2837165A
Cited
US2723677A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-23 | 1966-01-22 | 1966-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-23 | 1970-01-22 | 1970-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-23 | 1974-01-22 | 1974-07-24 | $7700.00 | Window Closed / Lapsed |