National Sponge Cushion Co. v. Allen Industries, Inc.

How later courts describe this case

• employer who fails to sign agreement and evinces no intent to be bound is not required to make contributions
• The written agreement with the employer may be a “written collective bargaining agreement or any other written agreement.”
• statute requires denial of pension benefits to 28-year employee of employer that made contributions to trust fund without ever having signed a written agreement; nor does statutory language permit application of equitable estoppel
• patent obtained by intentional and material misrepresentation to patent office
• equitable estoppel cannot supply missing writing