F04B 2201/121
Load on the sucker rod
F04B2201/121 (Load on the sucker rod) appears on 55 US grants and 58 published applications in this corpus.
Search patents in F04B- Granted patents
- 55
- Published applications
- 58
- Assignees
- 43
- Inventors
- 101
- Latest grant
- 20 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 2 |
| 2005 | 0 | 0 |
| 2006 | 1 | 2 |
| 2007 | 2 | 2 |
| 2008 | 0 | 1 |
| 2009 | 2 | 2 |
| 2010 | 0 | 2 |
| 2011 | 1 | 0 |
| 2012 | 2 | 0 |
| 2013 | 0 | 5 |
| 2014 | 0 | 0 |
| 2015 | 1 | 1 |
| 2016 | 0 | 2 |
| 2017 | 4 | 9 |
| 2018 | 5 | 5 |
| 2019 | 6 | 1 |
| 2020 | 4 | 6 |
| 2021 | 4 | 3 |
| 2022 | 4 | 4 |
| 2023 | 4 | 3 |
| 2024 | 3 | 5 |
| 2025 | 3 | 1 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for autonomous control of oil and gas well down-hole pump surface unit and reduction of gas interference20 Jan 2026US 12,529,373 B1
- Driving fluid cylinder and driven fluid cylinder and buffer16 Dec 2025US 12,497,962 B2I-Jack Technologies Incorporated
- Rod-pump controller16 Sep 2025US 12,416,298 B2Williams NR Automation LLC
- Pump systems and methods to improve pump load predictions20 May 2025US 12,305,632 B2Landmark Graphics Corporation
- Rod-pump controller4 Jun 2024US 12,000,262 B2Williams NR Automation LLC
- Adaptable sucker rod pump controller and system suitable for use with various well topologies17 Sep 2026US 2026/0275981 A1Ravdos Holdings Inc.
- Gas compressor and system and method for gas compressing19 Mar 2026US 2026/0078751 A1I-Jack Technologies Incorporated
- Gas Interference Detection and Control of Long-Stroke Pumping Unit Speed for Gas Interference Mitigation28 Aug 2025US 2025/0270919 A1ChampionX LLC
- Gas compressor and system and method for gas compressing19 Dec 2024US 2024/0418161 A1I-Jack Technologies Incorporated
- Novel rod-pump controller19 Sep 2024US 2024/0309749 A1Williams NR Automation LLC
Most cited
By later US patents
- Control circuit for shutting off the electrical power to a liquid well pump46US 4,286,925 ADelta-X Corporation · 1981
- Method of using a polished rod transducer41US 5,464,058 A1995
- Method for controlling rod-pumped wells21US 5,314,016 AShell Oil Company · 1994
- System for monitoring oil well performance20US 5,291,777 AIntevep, S. A. · 1994
- Method for controlling an artificial lifting system and an artificial lifting system employing same19US 9,745,975 B2Tundra Process Solutions Ltd. · 2017