Patent US2086667A successfully refreshed from Google Patents.
US2086667A
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Method of engaging tool joint threads
Assignee: Hughes Tool Co
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Filing: 1935-02-18
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Granted: 1937-07-13
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Expires: 1955-02-18
Abstract
No abstract record available.
Inventors
- 👤 Harold W Fletcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:33
CPC Classifications
B; B23; B23P; B23P19/00; B23P19/02; B23P19/04; B23P19/06; E; E21; E21B; E21B19/00; E21B19/16; E21B19/161; Y; Y10; Y10S; Y10S29/00; Y10S29/046; Y10T; Y10T29/00; Y10T29/49; Y10T29/49428; Y10T29/49764; Y10T29/49766; Y10T29/49826; Y10T29/49861
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1940-07-12 | 1941-01-11 | 1941-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-07-12 | 1945-01-11 | 1945-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-07-12 | 1949-01-11 | 1949-07-13 | $7700.00 | Window Closed / Lapsed |