US2970649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure sealed packer
Assignee: Individual
•
Filing: 1958-08-18
•
Granted: 1961-02-07
•
Expires: 1978-08-18
Abstract
No abstract record available.
Inventors
- 👤 Cicero C Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:13
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/126; E21B33/1265
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2704579A
Cited
US2194331A
Cited
US2343076A
Cited
US2373005A
Cited
US2379079A
Cited
US2578900A
Cited
US2618345A
Cited
US2585706A
Cited
US2691418A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-07 | 1964-08-08 | 1965-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-07 | 1968-08-08 | 1969-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-07 | 1972-08-08 | 1973-02-07 | $7700.00 | Window Closed / Lapsed |