F01D 11/08

Preventing or minimising internal leakage of working-fluid: for sealing space between rotor

Official title: for sealing space between rotor blade tips and stator (specially-shaped blade tips therefor F01D5/20)

F01D11/08 (Preventing or minimising internal leakage of working-fluid: for sealing space between rotor) appears on 3,793 US grants and 3,753 published applications in this corpus.

Search patents in F01D

Granted patents: 3,793
Published applications: 3,753
Assignees: 375
Inventors: 5,475
Latest grant: 6 Oct 2026

Filings by year

F01D 11/08: granted patents and published applications per publication year
Year	Granted patents	Published applications
1976	12	0
1977	16	0
1978	11	0
1979	11	0
1980	14	0
1981	27	0
1982	21	0
1983	22	0
1984	19	0
1985	23	0
1986	19	0
1987	32	0
1988	20	0
1989	22	0
1990	8	0
1991	33	0
1992	32	0
1993	28	0
1994	32	0
1995	17	0
1996	21	0
1997	27	0
1998	27	0
1999	27	0
2000	41	0
2001	36	14
2002	46	32
2003	45	37
2004	33	57
2005	46	73
2006	46	56
2007	44	72
2008	32	84
2009	44	105
2010	61	112
2011	60	93
2012	98	114
2013	82	171
2014	105	178
2015	109	209
2016	117	392
2017	177	304
2018	239	274
2019	371	262
2020	351	295
2021	308	196
2022	232	149
2023	163	137
2024	148	124
2025	154	93
2026	84	120

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

Preventing or minimising internal leakage of working-fluid: for sealing space between rotor

Filings by year

Subgroups

Recent patents

Most cited