promissory estoppel definitionthe doctrine of estoppelconsideration and promissory estoppelpromissory estoppel lawdoctrine of collateral estoppelpromissory estoppel requirementspromissory estoppel elementspromissory estoppel contractspromissory estoppel exampledoctrine of equitable estoppelpromissory estoppel meaningdoctrine of laches and estoppel
