US2671413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Split swab piston with flange type seals
Assignee: Mission Manufacturing Co
•
Filing: 1950-12-18
•
Granted: 1954-03-09
•
Expires: 1970-12-18
Abstract
No abstract record available.
Inventors
- 👤 Henry B Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:07
CPC Classifications
E; E21; E21B; E21B37/00; E21B37/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1449674A
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US2153843A
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US2201451A
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US2176231A
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US2290351A
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US2360577A
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US2326902A
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US2417349A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-08 | 1957-09-07 | 1958-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-08 | 1961-09-07 | 1962-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-08 | 1965-09-07 | 1966-03-09 | $7700.00 | Window Closed / Lapsed |