US2755070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulically expansible rotary drill bits
Assignee: Rotary Oil Tool Co
•
Filing: 1954-08-25
•
Granted: 1956-07-17
•
Expires: 1974-08-25
Abstract
No abstract record available.
Inventors
- 👤 Jr Archer W Kammerer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:10
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/26; E21B10/32; E21B10/34; E21B10/345; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
IN A ROTARY WELL DRILLING BIT CONNECTIBLE TO A TUBULAR DRILL STRING: A MAIN BODY; CUTTER MEANS MOUNTED ON SAID BODY FOR EXPANSION LATERALLY OF SAID BODY; HYDRAULICALLY OPERABLE MEANS OPERATIVELY CONNECTED TO SAID CUTTER MEANS AND SUBJECT TO THE PRESSURE OF FLUID IN THE DRILL STRING FOR EXPANDING SAID CUTTER MEANS LATERALLY OUTWARD;
Claim 2
Dependent Claim
54 words
IN A ROTARY WELL DRILLING BIT CONNECTIBLE TO A TUBULAR DRILL STRING: A MAIN BODY; CUTTER MEANS MOUNTED ON SAID BODY FOR EXPANSION LATERALLY OF SAID BODY; HYDRAULICALLY OPERABLE MEANS OPERATIVELY CONNECTED TO SAID CUTTER MEANS AND SUBJECT TO THE PRESSURE OF FLUID IN THE DRILL STRING FOR EXPANDING SAID CUTTER MEANS LATERALLY OUTWARD;
References Cited (Backward Citations)
US2151057A
Cited
US2457628A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-17 | 1960-01-16 | 1960-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-17 | 1964-01-16 | 1964-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-17 | 1968-01-16 | 1968-07-17 | $7700.00 | Window Closed / Lapsed |