US3427048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Baker Hughes Holdings LLC
•
Filing: 1966-01-03
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Granted: 1969-02-11
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Expires: 1986-01-03
Abstract
No abstract record available.
Inventors
- 👤 Cicero C Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:56
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/035; E21B33/038
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1867296A
Cited
US2962096A
Cited
US3147992A
Cited
US3338596A
Cited
US3361453A
Cited
US3321217A
Cited
US3333870A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |