Filter sheet
Kopf March 31, 1
U.S. patent number D325,070 [Application Number 07/365,022] was granted by the patent office on 1992-03-31 for filter sheet. Invention is credited to Henry B. Kopf.
| United States Patent | D325,070 |
| Kopf | March 31, 1992 |
Filter sheet
Claims
The ornamental design for a filter sheet, as shown and described.
| Inventors: | Kopf; Henry B. (Cary, NC) |
|---|---|
| Appl. No.: | 07/365,022 |
| Filed: | June 9, 1989 |
| Current U.S. Class: | D23/209 |
| Field of Search: | ;D23/200,207-210,316 ;210/227-228,231,321.75,321.84,445,456,488 |
References Cited [Referenced By]
U.S. Patent Documents
| 744761 | November 1903 | James |
| 802105 | October 1905 | Johnson et al. |
| 1138251 | May 1915 | Schaefer |
| 1282414 | December 1918 | Hagstrom |
| 1540251 | September 1925 | Buckley et al. |
| 2390628 | December 1945 | Van Winkle |
| 2473986 | September 1949 | Booth |
| 2590242 | March 1952 | Fusco |
| 2663431 | December 1953 | Clarke |
| 3221883 | December 1965 | Lennstrom |
| 3278033 | October 1966 | Winterstein |
| 3520803 | July 1970 | Iaconelli |
| 3585131 | June 1971 | Esmond |
| 3966612 | June 1976 | Johansson |
| 3988242 | October 1976 | Kurita et al. |
| 4229304 | October 1980 | Fismer |
| 4235721 | November 1980 | Nakamura et al. |
| 4310416 | January 1982 | Tanaka et al. |
| 4411784 | October 1983 | Esmond |
| 4430218 | February 1984 | Perl et al. |
| 4540492 | September 1985 | Kessler |
| 4543187 | September 1985 | Steppacher |
| 4624784 | November 1986 | Lefebvre |
| 4735718 | May 1988 | Peters |
| 4750983 | June 1988 | Foster et al. |
| 4769140 | September 1988 | Van Dijk et al. |
| 4801381 | January 1989 | Niesen |
| 4851112 | July 1989 | Schlensker |
| 4867876 | September 1989 | Kopf |
| 4913811 | April 1990 | Huang et al. |
| 36926 | Aug 1984 | EP | |||
| 2930986 | Feb 1980 | DE | |||
| 229603 | Nov 1985 | DD | |||
| 8600237 | Jan 1986 | WO | |||
| 1392030 | Apr 1975 | GB | |||
Other References
|
Prostak.TM. Bench Top Development System Lit No. SD200, 8/88. . "Toyo Soda Ultrafiltration Cassette UF-LABO", undated. . "Laboratory Ultrafiltration Products for Improved Biological Recovery", Lit. No. AB841, 10/88. . "Shorten the Race to the Market with Millipore Pilot and Process Systems", Lit. No. SD100, 1/88.. |
Primary Examiner: Burke; Wallace R.
Assistant Examiner: Tung; M. H.
Attorney, Agent or Firm: Hultquist; Steven J.
Description
FIG. 1 is a top plan view of a filter sheet showing my new design;
FIG. 2 is a bottom plan view thereof;
FIG. 3 is a side elevational view thereof, the opposite side being identical;
FIG. 4 is a front elevational view thereof, the rear being identical; and,
FIG. 5 is a front elevational view thereof, on an enlarged scale, partially shown for clarity and ease of illustration.
* * * * *
uspto.report is an independent third-party trademark research tool that is not affiliated, endorsed, or sponsored by the United States Patent and Trademark Office (USPTO) or any other governmental organization. The information provided by uspto.report is based on publicly available data at the time of writing and is intended for informational purposes only.
While we strive to provide accurate and up-to-date information, we do not guarantee the accuracy, completeness, reliability, or suitability of the information displayed on this site. The use of this site is at your own risk. Any reliance you place on such information is therefore strictly at your own risk.
All official trademark data, including owner information, should be verified by visiting the official USPTO website at www.uspto.gov. This site is not intended to replace professional legal advice and should not be used as a substitute for consulting with a legal professional who is knowledgeable about trademark law.
| 