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B31C 5/00

Making tubes or pipes without using mandrels

B31C5/00 (Making tubes or pipes without using mandrels) appears on 24 US grants and 26 published applications in this corpus.

Search patents in B31C

Granted patents: 24
Published applications: 26
Assignees: 14
Inventors: 49
Latest grant: 18 Nov 2025

Filings by year

B31C 5/00: granted patents and published applications per publication year
Year	Granted patents	Published applications
1981	1	0
1982	0	0
1983	0	0
1984	1	0
1985	0	0
1986	0	0
1987	0	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	1	0
1997	2	0
1998	0	0
1999	0	0
2000	0	0
2001	0	0
2002	0	0
2003	0	0
2004	0	0
2005	0	0
2006	0	0
2007	0	0
2008	0	0
2009	0	0
2010	0	0
2011	0	1
2012	0	0
2013	0	4
2014	2	2
2015	0	1
2016	4	1
2017	2	1
2018	0	1
2019	1	2
2020	2	2
2021	1	2
2022	2	0
2023	0	7
2024	1	1
2025	4	1

By publication year. Applications have been published since 2001.

Recent patents

Tubular element of cellulose or paper material for making hangers, process for making the same and hangers using said tubular element18 Nov 2025US 12,471,728 B2Mainetti S.P.A.
Machine and method for making a continuous tubular element with filling having a spacer and/or filter function4 Nov 2025US 12,458,058 B2G. D S.p.A.
Production machine for producing rod-shaped products from an endless strand of a strip adhesively bonded to form a tube20 May 2025US 12,302,941 B2KöRber Technologies GmbH
Manufacturing machine and manufacturing method for the production of a filter for a tubular element11 Feb 2025US 12,219,989 B2Sasib S.p.A.
Machine and method for making a continuous tubular element with filling having a spacer and/or filter function5 Nov 2024US 12,133,548 B2G. D S.p.A.

Most cited

By later US patents