Bizarre Patents
A helium-filled sun shade for protecting individuals engaged in outdoor activities.
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 5124044 - Phosphate removal from aquaria using immobilized ferric hydroxide
US Patent Issued on June 23, 1992
Estimated Patent Expiration Date:
January 9, 2011Estimated 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:
January 9, 2011Estimated 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.AbstractImmobilized ferric hydroxide selectively removes phosphate from aquarium water. The material provides a healthier environment and retards growth of undesirable algae and bacteria. | InventorsAssigneeApplicationNo. 639048 filed on 01/09/1991US Classes:210/683, Anions210/169, Aquarium or swimming pool210/170, Geographic (e.g., drainage ditch, septic, pond)210/504, With adhered coating or impregnant210/747Including geographic feature (e.g., drainage ditch, septic, pond)Field of Search210/169, Aquarium or swimming pool210/170, Geographic (e.g., drainage ditch, septic, pond)210/747, Including geographic feature (e.g., drainage ditch, septic, pond)210/683, Anions210/500.29, Cellulosic210/504, With adhered coating or impregnant210/503, Diverse granular or fibrous210/906Phosphorus containingExaminersPrimary: Silverman, Stanley S.Assistant: Nessler, Cynthia L. US Patent References3499837, 3723306, 3984313, Preferential removal of ammonia and phosphatesIssued on: 10/05/1976 Inventor: Higgins5019311Process for the production of materials characterized by a continuous web matrix or force point bonding Issued on: 05/28/1991 Inventor: Koslow International ClassC02F 001/58 |
