US2676147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling mud
Assignee: Texaco Development Corp
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Filing: 1951-11-16
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Granted: 1954-04-20
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Expires: 1971-11-16
Abstract
No abstract record available.
Inventors
- 👤 Rex P Mulligan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:25
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/22; Y; Y10; Y10S; Y10S435/00; Y10S435/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A MUD-LADEN AQUEOUS DRILLING FLUID CONTAINING STARCH AND AN ADDDITIVE COMPRISING A TERA ARLY SILICATE OF THE CLASS CONSISTING OF TETRA PHENYL SILICATE AND THE HOMOLOGS THEREOF IN WHICH THE PHENYL GROUP MAY BE SUBSTITUTED BY NO MORE THAN TWO METHYL GROUPS, SAID ADDITIVE BEING PRESENT IN SUFFICIENT AMOUNTS TO INHIBIT FERMENTATION THEREOF.
Claim 2
Dependent Claim
53 words
A MUD-LADEN AQUEOUS DRILLING FLUID CONTAINING STARCH AND AN ADDDITIVE COMPRISING A TERA ARLY SILICATE OF THE CLASS CONSISTING OF TETRA PHENYL SILICATE AND THE HOMOLOGS THEREOF IN WHICH THE PHENYL GROUP MAY BE SUBSTITUTED BY NO MORE THAN TWO METHYL GROUPS, SAID ADDITIVE BEING PRESENT IN SUFFICIENT AMOUNTS TO INHIBIT FERMENTATION THEREOF.
References Cited (Backward Citations)
US2271695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-19 | 1957-10-19 | 1958-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-19 | 1961-10-19 | 1962-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-19 | 1965-10-19 | 1966-04-20 | $7700.00 | Window Closed / Lapsed |