Granted Patent
Utility
US 6,646,441
· Confirmation No. 1694
WELL LOGGING SYSTEM FOR DETERMINING RESISTIVITY USING MULTIPLE TRANSMITTER-RECEIVER GROUPS OPERATING AT THREE FREQUENCIES AND AT OPTIMIZED GAIN
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Code | Description | Pages | ||
|---|---|---|---|---|---|
| 2006-04-19 | WFEE |
Fee Worksheet (SB06) | 2 | View | |
| 2006-04-11 | WFEE |
Fee Worksheet (SB06) | 1 | View | |
| 2006-04-06 | WFEE |
Fee Worksheet (SB06) | 1 | View | |
| 2003-08-21 | IFEE |
Issue Fee Payment (PTO-85B) | 2 | View | |
| 2003-08-21 | LET. |
Miscellaneous Incoming Letter | 1 | View | |
| 2002-01-19 | TRNA |
Transmittal of New Application | 2 | View | |
| 2002-01-19 | SPEC |
Specification | 13 | View | |
| 2002-01-19 | CLM |
Claims | 9 | View | |
| 2002-01-19 | ABST |
Abstract | 1 | View | |
| 2002-01-19 | DRW |
Drawings-only black and white line drawings | 7 | View | |
| 2002-01-19 | OATH |
Oath or Declaration filed | 3 | View |
Inventors
Classification
USPC
324/338
G01V3/30
Prosecution
- Examiner
- ZAVERI, SUBHASH
- Art Unit
- 2862
- Docket No.
- AES 01-002-1
- Confirmation No.
- 1694
Publication
- Pub. No.
- US20030137301A1
- Pub. Date
- 2003-07-24
Patent Term Adjustment
0days
No related applications found.
PATENT SECURITY INTEREST ASSIGNMENT AGREEMENT
Recorded 2023-04-26
WEATHERFORD TECHNOLOGY HOLDINGS, LLC,
WEATHERFORD NETHERLANDS B.V.,
WEATHERFORD NORGE AS,
HIGH PRESSURE INTEGRITY, INC.,
PRECISION ENERGY SERVICES, INC.,
WEATHERFORD CANADA LTD,
WEATHERFORD SWITZERLAND TRADING AND DEVELOPMENT GMBH,
PRECISION ENERGY SERVICES ULC,
WEATHERFORD U.K. LIMITED
RELEASE OF SECURITY INTEREST
Recorded 2021-10-01
from
HIGH PRESSURE INTEGRITY, INC.,
PRECISION ENERGY SERVICES, INC.,
WEATHERFORD CANADA LTD.,
WEATHERFORD NETHERLANDS B.V.,
WEATHERFORD NORGE AS,
WEATHERFORD SWITZERLAND TRADING AND DEVELOPMENT GMBH,
WEATHERFORD TECHNOLOGY HOLDINGS, LLC,
WEATHERFORD U.K. LIMITED
SECURITY INTEREST
Recorded 2021-10-01
WEATHERFORD TECHNOLOGY HOLDINGS, LLC,
WEATHERFORD NETHERLANDS B.V.,
WEATHERFORD NORGE AS,
HIGH PRESSURE INTEGRITY, INC.,
PRECISION ENERGY SERVICES, INC.,
WEATHERFORD CANADA LTD.,
WEATHERFORD SWITZERLAND TRADING AND DEVELOPMENT GMBH,
PRECISION ENERGY SERVICES ULC,
WEATHERFORD U.K. LIMITED
RELEASE OF SECURITY INTEREST
Recorded 2020-08-28
from
HIGH PRESSURE INTEGRITY, INC.,
PRECISION ENERGY SERVICES ULC,
PRECISION ENERGY SERVICES, INC.,
WEATHERFORD CANADA LTD.,
WEATHERFORD NETHERLANDS B.V.,
WEATHERFORD NORGE AS,
WEATHERFORD SWITZERLAND TRADING AND DEVELOPMENT GMBH,
WEATHERFORD TECHNOLOGY HOLDINGS, LLC,
WEATHERFORD U.K. LIMITED
SECURITY INTEREST
Recorded 2020-08-28
from
HIGH PRESSURE INTEGRITY, INC.,
PRECISION ENERGY SERVICES ULC,
PRECISION ENERGY SERVICES, INC.,
WEATHERFORD CANADA LTD.,
WEATHERFORD NETHERLANDS B.V.,
WEATHERFORD NORGE AS,
WEATHERFORD SWITZERLAND TRADING AND DEVELOPMENT GMBH,
WEATHERFORD TECHNOLOGY HOLDINGS, LLC,
WEATHERFORD U.K. LIMITED
SECURITY INTEREST
Recorded 2019-12-26
from
HIGH PRESSURE INTEGRITY INC.,
PRECISION ENERGY SERVICES INC.,
PRECISION ENERGY SERVICES ULC,
WEATHERFORD CANADA LTD.,
WEATHERFORD NETHERLANDS B.V.,
WEATHERFORD NORGE AS,
WEATHERFORD SWITZERLAND TRADING AND DEVELOPMENT GMBH,
WEATHERFORD TECHNOLOGY HOLDINGS LLC,
WEATHERFORD U.K. LIMITED
SECURITY INTEREST
Recorded 2019-12-18
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded 2017-05-22
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded 2006-04-26
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded 2006-04-24
CHANGE OF NAME
Recorded 2006-04-21
INVALID RECORDING: SEE DOCUMENT AT REEL 012842 FRAME 0121. (RE-RECORDED TO CORRECT THE SERIAL NUMBER ERRONEOUSLY ASSIGNED BY THE PTO)
Recorded 2002-01-19
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded 2002-01-19
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Quick Facts
- Patent No.
- US 6,646,441
- App. No.
- 10/053,043
- Filed
- 2002-01-19
- Granted
- 2003-11-11
- Pub. No.
- US20030137301A1
- Examiner
- ZAVERI, SUBHASH
- Art Unit
- 2862
- PTA
- 0 days
External Links