US2805166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glasses containing oxides of rare earth metals
Assignee: Individual
•
Filing: 1954-01-18
•
Granted: 1957-09-03
•
Expires: 1974-01-18
Abstract
No abstract record available.
Inventors
- 👤 Loffler Johannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:21
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/095; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/903; Y10S501/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
AS A NEW PRODUCT, GLASS FORMED SUBSTANTIALLY BY RARE EARTH METAL OXIDE-ALUMIN-SILICATES AND CONSISTING OF 10-70% BY WEIGHT OF AT LEAST ONE RARE EARTH METAL OXIDE, 10-20% BY WEIGHT OF A1203, AND THE BALANCE SI02, THE AMOUNT OF SI02 BEING IN THE RANGE OF ABOUT 21,5-46.0% BY WEIGHT.
Claim 2
Dependent Claim
48 words
AS A NEW PRODUCT, GLASS FORMED SUBSTANTIALLY BY RARE EARTH METAL OXIDE-ALUMIN-SILICATES AND CONSISTING OF 10-70% BY WEIGHT OF AT LEAST ONE RARE EARTH METAL OXIDE, 10-20% BY WEIGHT OF A1203, AND THE BALANCE SI02, THE AMOUNT OF SI02 BEING IN THE RANGE OF ABOUT 21,5-46.0% BY WEIGHT.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |