US2541341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well logging
Assignee: Texaco Inc
•
Filing: 1947-07-07
•
Granted: 1951-02-13
•
Expires: 1967-07-07
Abstract
No abstract record available.
Inventors
- 👤 Kenneth C Crumrine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:59
CPC Classifications
H; H01; H01J; H01J47/00; H01J47/12; G; G01; G01V; G01V11/00; G01V5/00; G01V5/04; G01V5/08; G01V5/10; G01V5/107
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
IN A LOGGING DEVICE, THE COMBINATION WHICH COMPRISES A LOGGING HEAD CONTAINING A SOURCE OF FAST NEUTRONS AND GAMMA RAYS, A PROPORTIONAL COUNTER SENSITIVE TO SLOW NEUTRONS AND GAMMA RAYS AND CAPABLE OF PRODUCING PULSES OF GREATER AMPLITUDE FROM SLOW NEUTRONS THAN FROM GAMMA RAYS, AND AMPLIFIER-DISCRIMINATOR CIRCUIT ADAPTED TO SUPPRESS PULSES OF THE GAMMA RAY AMPLITUDE AND TO LEAVE UNSUPPRESSED PULSES OF NEUTRON AM-
Claim 2
Dependent Claim
65 words
IN A LOGGING DEVICE, THE COMBINATION WHICH COMPRISES A LOGGING HEAD CONTAINING A SOURCE OF FAST NEUTRONS AND GAMMA RAYS, A PROPORTIONAL COUNTER SENSITIVE TO SLOW NEUTRONS AND GAMMA RAYS AND CAPABLE OF PRODUCING PULSES OF GREATER AMPLITUDE FROM SLOW NEUTRONS THAN FROM GAMMA RAYS, AND AMPLIFIER-DISCRIMINATOR CIRCUIT ADAPTED TO SUPPRESS PULSES OF THE GAMMA RAY AMPLITUDE AND TO LEAVE UNSUPPRESSED PULSES OF NEUTRON AM-
References Cited (Backward Citations)
US2220509A
Cited
US2288718A
Cited
US2334262A
Cited
US2316329A
Cited
US2345119A
Cited
US2321295A
Cited
US2462471A
Cited
US2443731A
Cited
US2483139A
Cited
US2440167A
Cited
US2390433A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |