CH512402A
Expired / Lapsed
CH
⏱️ 0.0 years remaining
Etched low-reflection glass
Assignee: Lechmann Conrad
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Filing: 1969-11-06
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Granted: —
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Expires: 1989-11-06
Abstract
Abstract Glass, esp. suitable for diapositive cover glasses (as it eliminates Newton's rings) has a surface (seen in a 100 - 200 magnification) consisting of obliquely over-lapping flat parts with rounded edges. It is produced by etching the glass surface with a soln. contg. (in g./l./:HF 308 - 475, H2SO4 88 - 515, and (NH4)HF2 15 - 83.5. The treatment is carried out for 4-120 secs. at 10 - 50 degrees C.
Inventors
- 👤 Lechmann Conrad
Bibliographic Details
Application Number
—
Jurisdiction
CH
Data Source
google_patents
Last Synchronized
2026-11-03 23:39
CPC Classifications
C; C03; C03C; C03C15/00
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