September 18, 1869
1 min read
Add Us On GoogleAdd SciAmApplications for Extension of Patents
On supporting science journalism
If you're enjoying this article, consider supporting our award-winning journalism by subscribing. By purchasing a subscription you are helping to ensure the future of impactful stories about the discoveries and ideas shaping our world today.
Mode of Hanging the Sceeens in Winnowing Machines.—John a. Krake, of Alden, n. y., has petitioned for the extension ot the above patent. Day of hearing, November 8,1869. Machine foe Channeling stone.—John Taggart, of Melrose, Mass., has ipplied for an extension of the above patent. Day of hearing November 15.1869. How to ret Patents lExtended. Patents can be extended, for seven years.under the general law. but t is requisite that the petition for extension should be filed witli the Commissioner of Patents, at least ninety days before the date on winch he patent expires. Many patents are now allowed to expire which could be nade profitable under an extended term. Applications for extensions can mly be made by the patentee, or. in the event of his death, by his legal rep-esentative. Parties interested in patents about to expire, can obtain all iccessary instructions how to proceed, free of charge, by writing to MUNN & co., 37 Park Row. New York.
It’s Time to Stand Up for Science
If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in that two-century history.
I’ve been a Scientific American subscriber since I was 12 years old, and it helped shape the way I look at the world. SciAm always educates and delights me, and inspires a sense of awe for our vast, beautiful universe. I hope it does that for you, too.
If you subscribe to Scientific American, you help ensure that our coverage is centered on meaningful research and discovery; that we have the resources to report on the decisions that threaten labs across the U.S.; and that we support both budding and working scientists at a time when the value of science itself too often goes unrecognized.
In return, you get essential news, captivating podcasts, brilliant infographics, can't-miss newsletters, must-watch videos, challenging games, and the science world's best writing and reporting. You can even gift someone a subscription.
There has never been a more important time for us to stand up and show why science matters. I hope you’ll support us in that mission.
