Whatever happened to patents needing to be "non-obvious" and patent grants being utilized within a certain time period? It seems those two provisions would solv

Whatever happened to patents needing to be "non-obvious" and patent grants being utilized within a certain time period? It seems those two provisions would solve a huge number of frivolous patent lawsuits. Both provisions existed at some point in the last 100 years. What the hell happened and when exactly did it happen? It seems like our patent laws were fairly reasonable not all that long ago.