Famous Patents
Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
PatentStorm News
Make the Most of PatentStorm
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest patents by subscribing to an RSS feed.
Got questions? Ask a Patent Expert!
Registered users: Manage your profile, comments and alerts.
US Patent 3992754 - Method for cleaning bagasse fiber using a U-shaped wash path
US Patent Issued on November 23, 1976
Estimated Patent Expiration Date:
November 23, 1993Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
Estimated Patent Expiration Date:
November 23, 1993Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.AbstractMethod for cleaning fibrous vegetable materials to remove trash components (such as coarse sand, stones, rocks, metallic particles, shives, dirt and the like). | InventorsAssigneeApplicationNo. 547278 filed on 02/05/1975US Classes:19/66R, Fluid or special treatment19/7, With liquid treatment209/173Water or aqueous solutionField of Search19/66R, Fluid or special treatment19/7, With liquid treatment19/8DepulpingExaminersPrimary: Newton, DorseyAttorney, Agent or FirmUS Patent References1733256, 2711822, 3688345 |
