Here's a claim where the inventor's patent was perforated with a dysfunctional means-plus-function claim element.
Shelly Cole invents a training brief that featured perforations along the outside of the legs to the waist. This thing was like a disposable diaper except they went on like briefs, hence "training briefs". And in the even of a ooops the sides could be ripped apart and the brief taken off like a diaper. Brilliant. Except for one thing, this claim:
1. A disposable training brief comprising, in combination:
outer impermeable layer means;
first absorbent layer means, including a first relatively thin outer absorbent layer and a first relatively thin inner absorbent layer, substantially coextensive with the outer impermeable layer;
second absorbent layer means including a relatively thick absorbent layer secured to the first absorbent layer means and disposed between the first outer absorbent layer and the first inner absorbent layer for providing a relatively highly absorbent layer;
waist band means for securing the training brief to a user;
leg band means through which the user's legs extend;
perforation means (

) extending from the leg band means to the waist band means through the outer impermeable layer means for tearing the outer impermeable layer means for removing the training brief in case of an accident by the user, and
side zones on the outer impermeable layer means adjacent to the perforation means at which the first absorbent layer means terminates.
In the above claim "perforation means" spelled disaster. In standard form it says "means for perforating", that's stupid, hell that would be a tatto machine. Should have been "means for allowing a human to rip apart with moderate, laterally oposing force, the sides of junior's brief" or something like that.
In a patent claim the word "means" is like a six shooter. Dont pull it unless you mean it, pardner, cause you are liable to get yore inventor's patent shot dead. "Perforations" absent the word "means" would probably have been as effective as the pro se lady's ice cream scoop claim, with the measured circumference deminsions, relative to the DOE. Means plus function elements must be done so without including structure.
Cole v. Kimberly Clark........tragic......
Bill