Colorimeter
Abstract
Abstract 846,171. Colorimeters. TECHNICON INTERNATIONAL Ltd. May 5, 1958 [June 5, 1957], No. 14340/58. Class 40(3). [Also in Group XX] In a colorimeter in which light from a source 34 is focused on a portion 152 of a flow cell 78, through which liquid is passed, and then falls on a photo-cell 110, the flow cell 78 is adjustable in position and comprises input and output arms 136, 138 which are connected by U-tubes 148, 162 and straight tubes 168, 164 to an intermediate arm 150 which includes the viewing portion 152; it is mounted in a holder 70 by means of a ball and socket joint l72, 180 wit a liquid outlet 182, a ball 186 and a disengageable socket 192 carried by a toggle 192, 206, and a spring 190 and abutment 188. The holder 70 is guided by pins 132 and slot 134 for adjustment in the direction 130 and the socket member 192 is adjustable laterally by a screwed bolt 198 on which it is pivoted. Light from the source 34 is focused at 68 by concave mirrors 62, 64 provided with central apertures 66, 67. A light filter assembly 92 is provided. The portion 152 of the flow cell may be of flat rectangular or of circular cross-section. Specification 774,711 is referred to.
Inventors
- 👤 Isreeli Jack
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-11 | 1965-03-13 | 1965-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-11 | 1969-03-13 | 1969-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-11 | 1973-03-13 | 1973-09-12 | $7700.00 | Window Closed / Lapsed |