US3481113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for the degassification of drilling muds
Assignee: Individual
•
Filing: 1967-12-18
•
Granted: 1969-12-02
•
Expires: 1987-12-18
Abstract
No abstract record available.
Inventors
- 👤 Gerald E Burnham Sr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:03
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/0021; B01D19/0042; B01D3/00; B01D3/10; B01D3/101; B01D46/00; B01D46/42; B01D46/4281; E; E21; E21B; E21B21/00; E21B21/06; E21B21/063; E21B21/067; Y; Y10; Y10S; Y10S159/00; Y10S159/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1810473A
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US2195898A
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US2748884A
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US2869673A
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US3204772A
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US3306341A
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US3362136A
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US3358425A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-01 | 1973-06-02 | 1973-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-01 | 1977-06-02 | 1977-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-01 | 1981-06-02 | 1981-12-02 | $7700.00 | Window Closed / Lapsed |