Patent US3266571A successfully refreshed from Google Patents.
US3266571A
Expired / Lapsed
US
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Casing slotting
Assignee: Halliburton Co
•
Filing: 1964-03-05
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Granted: 1966-08-16
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Expires: 1984-03-05
Abstract
No abstract record available.
Inventors
- 👤 John James C St
- 👤 Carroll L Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:33
CPC Classifications
E; E21; E21B; E21B29/00; E21B43/00; E21B43/11; E21B43/114
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
A METHOD FOR FORMING RADIAL SLOTS IN A CASING COMPRISING DIRECTING A STREAM OF ABRASIVE FLUID AGAINST SAID CASING, ROTATING THE DIRECTING MEANS RELATIVE TO THE CASING, AND SHIELDING A PORTION OF THE CASING FROM THE FLUID STREAM.
Claim 2
Independent Claim
38 words
A METHOD FOR FORMING RADIAL SLOTS IN A CASING COMPRISING DIRECTING A STREAM OF ABRASIVE FLUID AGAINST SAID CASING, ROTATING THE DIRECTING MEANS RELATIVE TO THE CASING, AND SHIELDING A PORTION OF THE CASING FROM THE FLUID STREAM.
References Cited (Backward Citations)
USRE21085E
Cited
US1658697A
Cited
US3066735A
Cited
US3130786A
Cited
US3075582A
Cited
US3145776A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |