Keystone Engineering Company
Mandeville, LA, US· latest recorded location
Keystone Engineering Company is named on 16 US grants and 16 published applications in this corpus. Its most frequent classification is E02B (Hydraulic engineering).
- Granted patents
- 16
- Published applications
- 16
- Inventors
- 10
- Granted in 2026 so far
- 0
- Most recent grant
- 7 Apr 2020
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 2 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 1 | 2 |
| 2012 | 0 | 0 |
| 2013 | 2 | 1 |
| 2014 | 1 | 0 |
| 2015 | 0 | 2 |
| 2016 | 0 | 1 |
| 2017 | 2 | 2 |
| 2018 | 2 | 2 |
| 2019 | 1 | 0 |
| 2020 | 1 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
By publication year.
Technology areas
Share of 32 documents
- E02BHydraulic engineering11
- E02DFoundations10
- Y02PLow-carbon manufacturing9
- F17CVessels for containing or storing compressed, liquefied or solidified gases7
- B64GCosmonautics6
- C21DModifying the physical structure of ferrous metals6
- C22CAlloys6
- C22FChanging the physical structure of non-ferrous metals and non-ferrous alloys6
- B23KSoldering or unsoldering5
- B21DWorking or processing of sheet metal or metal tubes, rods or profiles3
Recent patents
- Center of mass control of liquid tanks for spacecraft use7 Apr 2020US 10,611,503 B2
- Stress relieved welds in positive expulsion fuel tanks with rolling metal diaphragms19 Nov 2019US 10,479,532 B2
- Stress relieved welds in positive expulsion fuel tanks with elastomeric diaphragm27 Nov 2018US 10,139,047 B2
- Method of fabricating space satellite tank components utilizing additive manufacturing and spin forming2 Oct 2018US 10,088,103 B2
- Method and apparatus for performing a localized post-weld heat treatment on a thin wall metallic cylinder12 Dec 2017US 9,840,752 B2
- Floating offshore wind turbine substructure13 Apr 2023US 2023/0113147 A1
- Method of fabricating space satellite tank components utilizing additive manufacturing and spin forming6 Dec 2018US 2018/0347756 A1
- Center of mass control of liquid tanks for spacecraft use4 Oct 2018US 2018/0281992 A1
- Stress relieved welds in positive expulsion fuel tanks with elastomeric diaphragm19 Jan 2017US 2017/0016574 A1
- Method of fabricating space satellite tank components utilizing additive manufacturing and spin forming5 Jan 2017US 2017/0002978 A1
Most cited
By later US patents
- High performance low torque anti-friction bearing assembly14US 4,400,042 A1983
- Offshore structure support and foundation for use with a wind turbine and an associated method of assembly12US 7,198,453 B22007
- Offshore support structure and associated method of installing5US 8,511,940 B22013
- High-performance low-torque anti-friction bearing assembly3US 4,523,793 A1985
- Method of assembling high-performance low-torque anti-friction bearing assembly3US 4,635,330 A1987