Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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US Patent 6268489 - Azithromycin dihydrate
US Patent Issued on July 31, 2001
Estimated Patent Expiration Date:
July 31, 2018Estimated 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:
July 31, 2018Estimated 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.AbstractNon-hygroscopic, azithromycin (9-deoxo-9a-aza-9a-methyl-9a-homoerythromycin) dihydrate and a process therefor.Other References
| InventorsApplicationNo. 994040 filed on 12/21/1992US Classes:536/7.4, Additional nitrogen containing536/18.5ProcessesField of Search536/7.4, Additional nitrogen containing536/18.5ProcessesExaminersPrimary: Peselev, ElliAttorney, Agent or FirmUS Patent References4020270, L-lyxohex-1-enopyranose derivativeIssued on: 04/26/1977 Inventor: Arcamone , et al.4219641, Process for preparing erythromycin succinate Issued on: 08/26/1980 Inventor: Desposato , et al.4474768, N-Methyl 11-aza-10-deoxo-10-dihydro-erytromycin A, intermediates therefor Issued on: 10/02/1984 Inventor: Bright4512982, 9-Aza-9-homoerythromycin compounds, pharmaceutical composition and therapeutic method Issued on: 04/23/1985 Inventor: Hauske , et al.4517359, 11-Methyl-11-aza-4-0-cladinosyl-6-0-desosaminyl-15-ethyl-7,1 3,14-trihydroxy-3,5,7,9,12,14-hexamethyl-oxacyclopentadecane-2-one and derivatives thereof Issued on: 05/14/1985 Inventor: Kobrehel , et al.4526889, Epimeric azahomoerythromycin A derivative, intermediates and method of use Issued on: 07/02/1985 Inventor: Bright4963531Azithromycin and derivatives as antiprotozoal agents Issued on: 10/16/1990 Inventor: Remington International ClassC07H 017/08Foreign Application Priority Data1987-07-09 WO |
