Patent US3405956A successfully refreshed from Google Patents.
US3405956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for mechanically keying parts to one another
Assignee: Vetco Gray LLC
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Filing: 1966-03-22
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Granted: 1968-10-15
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Expires: 1986-03-22
Abstract
No abstract record available.
Inventors
- 👤 Jr Elwood K Pierce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:18
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2104180A
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US2438107A
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GB730339A
Cited
US2994381A
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US3071188A
Cited
US3168337A
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US3288222A
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US3326580A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-15 | 1972-04-15 | 1972-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-15 | 1976-04-15 | 1976-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-15 | 1980-04-15 | 1980-10-15 | $7700.00 | Window Closed / Lapsed |