F28F 21/00

Constructions of heat-exchange apparatus characterised by the selection of particular materials

Official title: Constructions of heat-exchange apparatus characterised by the selection of particular materials {(coatings for modifying heat-transfer F28F13/18; coatings for preventing the formation of deposits or corrosion F28F19/02)}

F28F21/00 (Constructions of heat-exchange apparatus characterised by the selection of particular materials) appears on 3,118 US grants and 3,724 published applications in this corpus.

Search patents in F28F

Granted patents: 3,118
Published applications: 3,724
Assignees: 1,835
Inventors: 8,329
Latest grant: 6 Oct 2026

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F28F 21/00: granted patents and published applications per publication year
Year	Granted patents	Published applications
1976	22	0
1977	22	0
1978	25	0
1979	18	0
1980	27	0
1981	27	0
1982	33	0
1983	30	0
1984	20	0
1985	25	0
1986	40	0
1987	39	0
1988	49	0
1989	35	0
1990	41	0
1991	36	0
1992	32	0
1993	45	0
1994	39	0
1995	31	0
1996	32	0
1997	31	0
1998	51	0
1999	62	0
2000	44	0
2001	46	24
2002	52	64
2003	51	87
2004	48	81
2005	38	81
2006	49	90
2007	50	97
2008	27	93
2009	25	96
2010	38	141
2011	38	145
2012	58	124
2013	60	158
2014	58	171
2015	96	208
2016	114	208
2017	135	211
2018	154	255
2019	195	249
2020	195	216
2021	170	186
2022	160	194
2023	117	184
2024	127	145
2025	94	116
2026	67	100

By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.

Constructions of heat-exchange apparatus characterised by the selection of particular materials

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