Patent EP0063790A2 successfully refreshed from Google Patents.
← Back to Patent Explorer
EP0063790A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Phototropic glass with a refraction index equal to or greater than 1.59, an Abbe number equal to or greater than 40 and a density equal to or smaller than 3.2 g/cm3

Assignee: Schott AG
•
Filing: 1982-04-22
•
Granted: —
•
Expires: 2002-04-22
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract Translated from German Ein phototropes Glas mit der optischen Lage n d > 1.59 und v d ≥ 40 und mit einer Dichte ≤ 3,2 g.cm- 3 wird erstmals beschrieben. Seine Zusammensetzung liegt im System SiO 2 . R 2 O 3 - R 2 O - RO - RO x - R 2 O 5 , wobei R 2 O 3 , für Al 2 O 3 , B 2 O 3 und Seltenerdoxide, R 2 O für Alkalimetalloxide, RO für Erdalkalimetalloxide, ZnO, SnO, PbO, RO x für GeO 2 , ZrO 2 , TiO 2 , WO 3 , und R 2 O 5 für Nb 2 O 5 , Ta 2 O 5 , P 2 O 5 stehen. A phototropic glass with the optical position n d > 1.59 and v d ≥ 40 and with a density ≤ 3.2 g.cm- 3 is described for the first time. Its composition lies in the SiO 2 system . R 2 O 3 - R 2 O - RO - RO x - R 2 O 5 , where R 2 O 3 , for Al 2 O 3 , B 2 O 3 and rare earth oxides, R 2 O for alkali metal oxides, RO for alkaline earth metal oxides, ZnO, SnO, PbO, RO x are GeO 2 , ZrO 2 , TiO 2 , WO 3 , and R 2 O 5 are Nb 2 O 5 , Ta 2 O 5 , P 2 O 5 .

Inventors

  • 👤 Georg Dr. Gliemeroth
  • 👤 Uwe Dr. Eichhorn

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-08 17:24
CPC Classifications
C; C03; C03C; C03C4/00; C03C4/04; C03C4/06

Claims Analysis

Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Maintenance schedule is calculated for granted US utility patents.

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag