- The claim description left much room for discretion with respect to the choice of test method, even if the specification was not as detailed as many other then see this format claimed. This applied also to the measurement of crack propagation resistance.
- It is claimed that the slow crack propagation resistance is determined by subjecting the sample to an applying stress of at least 1.0 MPa, preferably 2.0 MPa, in a so-called "test." The period of ``test" is described as occurs for instance after 1,24,g months. It is not clear why the sample stress is being increased several times but the effect on the test results would lead to a substantially increased slow crack propagation resistance.
For instance in FIG. 1 the given sample was subjected to the above slow crack propagation test after 24 months, stress 2.0 MPa, after 50 months to stress 2.0 MPa and after 72 months stress 2.0 MPa. Data for this test are displayed on a laptop and the user knows that a slow crack propagation resistance of 2490 hours has been achieved.
- The absolute value of the stress is not specified in the claim. Its value (1.0 MPa) is apparently the same as the stress in the invention. It is not made clear how exactly the test procedure is to be carried out. d2c66b5586