Patent US2560930A successfully refreshed from Google Patents.
US2560930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixture for controlling properties of drill fluids
Assignee: Houston Oil Field Material Co Inc
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Filing: 1948-08-23
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Granted: 1951-07-17
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Expires: 1968-08-23
Abstract
No abstract record available.
Inventors
- 👤 Nash O Campise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:14
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A MIXTURE FOR TREATING AQUEOUS AND OIL EMULSION DRILL FLUIDS COMPRISING SUBSTANTIALLY EQUIMOLECULAR PROPORTIONS OF ALKALI METAL CARBONATE AND HYDRATED OXIDE OF ALKALINE EARTH MATERIAL AND INCLUDING AN ORGANIC COMPOUND SELECTED FROM THE CLASS CONSISTING OF VEGETABLE TANNIN EXTRACT, TANNIC ACID, HUMIC ACID, PYROGALLIC ACID, GALLIC ACID AND QUEBRACHO EXTRACT.
Claim 2
Dependent Claim
50 words
A MIXTURE FOR TREATING AQUEOUS AND OIL EMULSION DRILL FLUIDS COMPRISING SUBSTANTIALLY EQUIMOLECULAR PROPORTIONS OF ALKALI METAL CARBONATE AND HYDRATED OXIDE OF ALKALINE EARTH MATERIAL AND INCLUDING AN ORGANIC COMPOUND SELECTED FROM THE CLASS CONSISTING OF VEGETABLE TANNIN EXTRACT, TANNIC ACID, HUMIC ACID, PYROGALLIC ACID, GALLIC ACID AND QUEBRACHO EXTRACT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-16 | 1955-01-15 | 1955-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-16 | 1959-01-15 | 1959-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-16 | 1963-01-15 | 1963-07-17 | $7700.00 | Window Closed / Lapsed |