Correct spelling - Isinglass or Eisenglass curtains?

Eisenglass although in today's world it would only be "Eisenglass style." Eisenglass was actually a brand name and hasn't been manufactured under that brand for years. Better to refer to the type material or the manufacturer today.

Isinglass is a substance obtained from the dried swim bladders of fish. It is a form of collagen used mainly for the clarification or fining of beer. It can also be cooked into a paste for specialized gluing purposes. Now the term isd sometimes used to refer to "Eisenglass style" and has some common acceptance.

90% of what I hear today is either Strataglass (and they make several different products) or EZ2CY.

As I understand it "Eisenglass" or "Isenglass" are used to refer to clear vinyl.

It's funny if you go to Amazon. You'll get products spelled either way. However, the 4th item will be Strataglass clearn. The others will say plastic cleaner or clear vinyl cleaner. Most of them don't use the word "Eisenglass" or "Isenglass" in their description. All meta data for search engines.

Go to the google search you put above and the second item behind Yacht Forum will be the product at West. Nowhere will it mention Eisenglass. Not even Eisenshine mentions Eisenglass again. So, it's an old word that lots of people still use, but a lot of lack of clarity as to what one means by it. Clear Vinyl seems to be the most used definition. It became quite a generic term. You have some people using Strataglass generically too, especially some untrustworthy canvas shops that get a sheet product and sell it as Strataglass. I've heard they've gone after a couple after they got complaints. Don't know for certain.

We use Isinglass to clarify wine. I understand it's made from fish bladders. Works well.

I still call tissues "Kleenex." And I still call roll-up windows Eisenglass.

Judy

Kleenex has worked very hard and not that successfully at times to maintain protection of their trademark, but since Eisenglass is long ago dead, they're not going to come after you. Now Strataglass might.

It really only matters when one is selling and representing or when one is cleaning as knowing the material and any coating used on it is important to choosing the right cleaning product.

There are some brands in the market that will come after you very aggressively. Levi's brand will. It is a serious and potentially firing offense at Levi Strauss and Co. to ever put the word "Levi's" into any document without it being accompanied by the registration symbol and the word "brand." Obviously, it must always be capitalized too. There are internal documents advising every employee.

Coca-Cola still is aggressive in protecting their majority hold on the cola business and their name. Years ago Burger King was forced to pay a huge penalty to Coke. They sold only Pepsi products and when people would ask for a Coke, they'd give them a Pepsi. As soon as the litigation started, Burger King instructed all their employees to say, "I''m sorry. We don't carry Coke. Will Pepsi be ok?" It wasn't long after that however that Burger King switched from Pepsi to Coke.

Oh and South Florida had one of the all time crazy situations thanks to Wayne Huizenga and a ridiculously stubborn Pizza man. I remember reading about it even living in NC. A guy opened Buster Block's Pizza Company in Hollywood I believe. Blockbuster sued. Buster Block hired an attorney who I believe rightfully claimed they didn't infringe. However, Buster Block's soon spent $50,000+ on attorney fees and was broke and closed, then I believe unsuccessfully suing Blockbuster for the damage. Now, stubbornness lost once again. The moment Blockbuster sued them and gave them tons of free publicity they should have then just renamed the business to appease Blockbuster and capitalized on their notoriety.