Pilgrim Engineering Developments, Ltd.

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Records under this name other than patents Pilgrim Engineering Developments, Ltd. holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned.

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Patent	Title	Status	Expires	Confidence
US 3,942,466	Stern gear of ships Term ended Term ended no later than Mar 9, 1996 · Low confidence	Term ended	Term ended no later than Mar 9, 1996	Low confidence
US 3,983,829	Ships' stern construction Term ended Term ended no later than Oct 5, 1996 · Low confidence	Term ended	Term ended no later than Oct 5, 1996	Low confidence
US 4,120,230	Self-straining bolts Term ended Term ended no later than Oct 17, 1998 · Low confidence	Term ended	Term ended no later than Oct 17, 1998	Low confidence
US 4,153,280	Pipe couplings Term ended Term ended no later than May 8, 1999 · Low confidence	Term ended	Term ended no later than May 8, 1999	Low confidence
US 4,153,656	Pipe joints Term ended Term ended no later than May 8, 1999 · Low confidence	Term ended	Term ended no later than May 8, 1999	Low confidence
US 4,175,311	Joints Term ended Term ended no later than Nov 27, 1999 · Low confidence	Term ended	Term ended no later than Nov 27, 1999	Low confidence
US 4,177,971	Sea cock valve Term ended Term ended no later than Dec 11, 1999 · Low confidence	Term ended	Term ended no later than Dec 11, 1999	Low confidence
US 4,182,518	Sealing arrangements Term ended Term ended no later than Jan 8, 2000 · Low confidence	Term ended	Term ended no later than Jan 8, 2000	Low confidence
US 4,226,444	Pipe joints Term ended Term ended no later than Oct 7, 2000 · Low confidence	Term ended	Term ended no later than Oct 7, 2000	Low confidence
US 4,281,580	Tensioning devices Formerly held Term ended Term ended no later than Aug 4, 2001 · Low confidence	Term ended	Term ended no later than Aug 4, 2001	Low confidence

10 of 13 patents shown.

Pro members see all 13.

Pro members: see all 13 patents