US2557619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removable pin installation for well drilling cutter assemblies
Assignee: SECURITY ENGINEERING Co Inc
•
Filing: 1947-02-15
•
Granted: 1951-06-19
•
Expires: 1967-02-15
Abstract
No abstract record available.
Inventors
- 👤 Kenneth H Swart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:18
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/26; E21B10/28; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49815; Y10T29/49822; Y10T29/53; Y10T29/53796; Y10T29/53839; Y10T29/53843
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1792927A
Cited
US2111781A
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US2174102A
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US2348293A
Cited
US2429967A
Cited
US2407471A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-18 | 1954-12-18 | 1955-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-18 | 1958-12-18 | 1959-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-18 | 1962-12-18 | 1963-06-19 | $7700.00 | Window Closed / Lapsed |