B29C 66/432

For making tubular articles or closed loops

Official title: {for making tubular articles or closed loops, e.g. by joining several sheets (B29C66/547 takes precedence; bending and joining sheets at right angles to the longitudinal axis of the article being formed and joining the edges B29C53/38); for making hollow articles or hollow preforms}

B29C66/432 (For making tubular articles or closed loops) appears on 1,886 US grants and 1,262 published applications in this corpus.

Search patents in B29C

Granted patents: 1,886
Published applications: 1,262
Assignees: 979
Inventors: 2,968
Latest grant: 8 Sep 2026

Filings by year

B29C 66/432: granted patents and published applications per publication year
Year	Granted patents	Published applications
1976	34	0
1977	29	0
1978	43	0
1979	16	0
1980	26	0
1981	44	0
1982	19	0
1983	25	0
1984	18	0
1985	37	0
1986	35	0
1987	38	0
1988	41	0
1989	40	0
1990	44	0
1991	31	0
1992	27	0
1993	30	0
1994	37	0
1995	43	0
1996	37	0
1997	32	0
1998	57	0
1999	42	0
2000	33	0
2001	57	12
2002	44	52
2003	57	60
2004	48	64
2005	44	49
2006	39	51
2007	21	56
2008	25	44
2009	21	49
2010	33	47
2011	34	58
2012	41	60
2013	36	62
2014	45	49
2015	41	70
2016	57	55
2017	51	53
2018	37	55
2019	61	59
2020	48	55
2021	35	55
2022	47	39
2023	35	31
2024	32	26
2025	31	36
2026	8	15

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

For making tubular articles or closed loops

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