Patent US3281253A successfully refreshed from Google Patents.
US3281253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical glass
Assignee: Bausch and Lomb Inc
•
Filing: 1963-03-28
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Granted: 1966-10-25
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Expires: 1983-03-28
Abstract
No abstract record available.
Inventors
- 👤 Robert A Weidel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:42
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/12; C03C3/16; C03C3/17; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
A GLASS COMPOSITION CONSISTING ESSENTIALLY OF 25-50 WEIGHT PERCENT ALUMINUM METAPHOSPHATE, 10-45 WEIGHT PERCENT ALKALI METAPHOSPHATE, 10-25 WEIGHT PERCENT ALKALINE EARTH METAPHOSPHATE AND 10-25 WEIGHT PERCENT LEAD METAPHOSPHATE.
Claim 2
Dependent Claim
28 words
A GLASS COMPOSITION CONSISTING ESSENTIALLY OF 25-50 WEIGHT PERCENT ALUMINUM METAPHOSPHATE, 10-45 WEIGHT PERCENT ALKALI METAPHOSPHATE, 10-25 WEIGHT PERCENT ALKALINE EARTH METAPHOSPHATE AND 10-25 WEIGHT PERCENT LEAD METAPHOSPHATE.
References Cited (Backward Citations)
US2294844A
Cited
US3118788A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |