US2964427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultra-violet filter
Assignee: Geraetebau-Anstalt
•
Filing: 1958-03-06
•
Granted: 1960-12-13
•
Expires: 1978-03-06
Abstract
No abstract record available.
Inventors
- 👤 Rheinberger Peter
- 👤 Auwarter Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:43
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/04; G03C7/06; A; A61; A61F; A61F9/00; A61F9/02; A61F9/022; C; C03; C03C; C03C17/00; C03C17/22; C03C17/23; C03C17/245; C23; C23C; C23C14/00; C23C14/06; C23C14/08; G02; G02B; G02B5/00; G02B5/20; G02B5/208; C03C2217/00; C03C2217/20; C03C2217/21; C03C2217/23; C03C2218/00; C03C2218/10; C03C2218/15; C03C2218/151
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
AN ULTRA-VIOLET FILTER COMPRISING IN COMBINATION: A BASE PERMEABLE TO LIGHT AND A HARD, WELL ADHERING, MECHANICALLY AND CHEMICALLY RESISTANT THIN ULTRA-VIOLET ABSORBING LAYER DEPOSITED IN THE DRY STATE ON SAID BASE, SAID LAYER CONTAINING A CERIUM OXIDE AND AT LEAST ONE FURTHER SUBSTANCE BELONGING TO THE GROUP CONSISTING OF TITANIUM OXIDE, SILICON OXIDE AND CHROMIUM OXIDE, THE MOLECULAR QUANTITY OF SAID CERIUM OXIDE BEING SUBSTANTIALLY TWICE THAT OF THE SAID OTHER SUBSTANCE.
Claim 2
Dependent Claim
73 words
AN ULTRA-VIOLET FILTER COMPRISING IN COMBINATION: A BASE PERMEABLE TO LIGHT AND A HARD, WELL ADHERING, MECHANICALLY AND CHEMICALLY RESISTANT THIN ULTRA-VIOLET ABSORBING LAYER DEPOSITED IN THE DRY STATE ON SAID BASE, SAID LAYER CONTAINING A CERIUM OXIDE AND AT LEAST ONE FURTHER SUBSTANCE BELONGING TO THE GROUP CONSISTING OF TITANIUM OXIDE, SILICON OXIDE AND CHROMIUM OXIDE, THE MOLECULAR QUANTITY OF SAID CERIUM OXIDE BEING SUBSTANTIALLY TWICE THAT OF THE SAID OTHER SUBSTANCE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-13 | 1964-06-13 | 1964-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-13 | 1968-06-13 | 1968-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-13 | 1972-06-13 | 1972-12-13 | $7700.00 | Window Closed / Lapsed |