Back to results
US 12,529,646 B2Granted
Test chamber for photostability testing
AssigneeLonza Ltd.
InventorsLea Sorret, Ahmed Besheer, Maximilian Wozniewski, Martin Vogt
Life of this patent
Estimating the term…
Abstract
The present disclosure provides an ultraviolet light filter for use in photostability testing chambers, and in particular, filters that are designed to allow for air ventilation and maintenance of desired temperatures at the sample level during light exposure testing.
Claims20
A photostability testing chamber (200), comprising:
- a. an interior chamber having a top surface (206), a bottom surface (302) and two opposing sidewalls (308, 310);
- b. a light source (202) located on the top surface (206);
- c. a sample platform (204) positioned above the bottom surface (302);
- d. a filter (100) comprising:
- i. a first planar structure (102) configured to span a horizontal cross-section of the photostability chamber (200);
- ii. a first baffle (104) spaced from a first edge (150) of the first planar structure (102) and extending from a lower surface of the first planar structure (102);
- iii. a second baffle (106) spaced from a second edge (152) of the first planar structure (102) and extending from the lower surface of the first planar structure (102);
- wherein the first edge (150) and the second edge (152) are opposing edges of the first planar structure (102);
- iv. a first through opening (108) in the first planar structure (102) located between the first edge (150) and the first baffle (104);
- v. a second through opening (110) in the first planar structure (102) located between the second edge (152) and the second baffle (106), wherein the filter (100) is configured to be suspended within the photostability chamber (200), and wherein the first planar structure (102) comprises a polymer that limits at least 30% transmission of ultraviolet light,
- e. the filter (100) being positioned at least 6 cm above the sample platform (204) and below the light source (202), the filter (100) supported by internal screws (314) on the two opposing sidewalls (308, 310);
- f. an air inlet vent (304) in a first sidewall (308);
- and
- g. an air outlet vent (306) in a second sidewall (310), wherein the first baffle (104) of the filter (100) is configured to direct air flow from the air inlet vent (304):
- through the first through opening (108), across the first planar structure (102), and through the second through opening (110);
- and also below the filter (100) into the sample area;
- and out of the air outlet vent (306).
14 more elements
Dependencies are inferred from the claim text.