Patent US2650197A successfully refreshed from Google Patents.
US2650197A
Expired / Lapsed
US
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Well drilling composition and method of manufacture thereof
Assignee: Individual
•
Filing: 1953-04-21
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Granted: 1953-08-25
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Expires: 1973-04-21
Abstract
No abstract record available.
Inventors
- 👤 Henry W Rahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:51
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/03; C09K8/032
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A SOLID GRANULAR WELL TREATING COMPOSITION COMPRISING AN ALKALI METAL HYDROXIDE AND A CARBONIFEROUS MINERAL CONTAINING AT LEAST 10 PERCENT BY WEIGHT OF HUMIC ACID, SAID COMPOSITION HAVING BEEN AT LEAST PARTIALLY DEHYDRATED BY HEATING A MIXTURE OF ALKALI METAL HYDROXIDE, WATER, AND THE CARBONIFEROUS MINERAL TO PRODUCE A SOLID COMPOSITION, THE TEMPERATURE OF HEATING DURING AT LEAST A PORTION OF THE HEATING BEING ABOVE 90* C. BUT BELOW THE TEMPERATURE AT WHICH SUBSTANTIAL PYROLYSIS OF THE HUMIC ACID COMPONENTS OCCURS UNTIL A DRY PRODUCT HAS BEEN OBTAINED; THE AMOUNT OF ALKALI METAL HYDROXIDE IN SAID COMPOSITION BEING IN EXCESS OF THAT REQUIRED TO REACT WITH THE HUMIC ACID TO PRODUCE A NEUTRAL PRODUCT.
Claim 2
Dependent Claim
114 words
A SOLID GRANULAR WELL TREATING COMPOSITION COMPRISING AN ALKALI METAL HYDROXIDE AND A CARBONIFEROUS MINERAL CONTAINING AT LEAST 10 PERCENT BY WEIGHT OF HUMIC ACID, SAID COMPOSITION HAVING BEEN AT LEAST PARTIALLY DEHYDRATED BY HEATING A MIXTURE OF ALKALI METAL HYDROXIDE, WATER, AND THE CARBONIFEROUS MINERAL TO PRODUCE A SOLID COMPOSITION, THE TEMPERATURE OF HEATING DURING AT LEAST A PORTION OF THE HEATING BEING ABOVE 90* C. BUT BELOW THE TEMPERATURE AT WHICH SUBSTANTIAL PYROLYSIS OF THE HUMIC ACID COMPONENTS OCCURS UNTIL A DRY PRODUCT HAS BEEN OBTAINED; THE AMOUNT OF ALKALI METAL HYDROXIDE IN SAID COMPOSITION BEING IN EXCESS OF THAT REQUIRED TO REACT WITH THE HUMIC ACID TO PRODUCE A NEUTRAL PRODUCT.
References Cited (Backward Citations)
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Cited
US958893A
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US1999766A
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US2109858A
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US2211688A
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US2376885A
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US2620300A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-24 | 1957-02-23 | 1957-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-24 | 1961-02-23 | 1961-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-24 | 1965-02-23 | 1965-08-25 | $7700.00 | Window Closed / Lapsed |