21. Waiver and estoppel are two reasonable defences for cancellation. 22. Other defenses, including equitable estoppel , were used to bar redemption as well. 23. As I have said they are not cases of estoppel in the strict sense. 24. The contract price as a point of reference may help determine the promissory estoppel . 25. The remedy for promissory estoppel is reliance damages. 26. F was entitled to a beneficial interest in the property based on proprietary estoppel . 27. _The owner's estoppel certificate. 28. In the United States, the doctrine of equivalents is limited by prosecution history estoppel . 29. Instead an estoppel argument based on representation, reliance, detriment and irrevocability is utilised. 30. In order to preserve equity, the court will likely find an easement by estoppel .
