Patent US2829865A successfully refreshed from Google Patents.
US2829865A
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US
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Drilling rig
Assignee: PEYTON
•
Filing: 1956-04-02
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Granted: 1958-04-08
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Expires: 1976-04-02
Abstract
No abstract record available.
Inventors
- 👤 Albert E Wagner
- 👤 Miller Irving
- 👤 Victor J Nelson
- 👤 Gerald L Peyton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:31
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/04; E21B7/06; E21B7/02; E21B7/021; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17666
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1497483A
Cited
US2048072A
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US2123344A
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US2237875A
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US2310000A
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US2570308A
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US2534213A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-07 | 1961-10-07 | 1962-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-07 | 1965-10-07 | 1966-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-07 | 1969-10-07 | 1970-04-08 | $7700.00 | Window Closed / Lapsed |