US2419841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gun perforator for oil well casings
Assignee: Individual
•
Filing: 1939-12-18
•
Granted: 1947-04-29
•
Expires: 1959-12-18
Abstract
No abstract record available.
Inventors
- 👤 Lampel Walter
- 👤 Horndlein Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:18
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/11; E21B43/116
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2062974A
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US2142583A
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US2210125A
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US2216144A
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US2210192A
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US2296318A
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US2216151A
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US2216359A
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US2250055A
Cited
US2255838A
Cited
US2250056A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-04-28 | 1950-10-28 | 1951-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-04-28 | 1954-10-28 | 1955-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-04-28 | 1958-10-28 | 1959-04-29 | $7700.00 | Window Closed / Lapsed |