Patent US3041191A successfully refreshed from Google Patents.
US3041191A
Expired / Lapsed
US
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Large diameter high refractive index glass beads
Assignee: Flex-O-Lite Manuf Corp
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Filing: 1961-03-15
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Granted: 1962-06-26
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Expires: 1981-03-15
Abstract
No abstract record available.
Inventors
- 👤 D Adrian Vincent L Duval
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:19
CPC Classifications
C; C03; C03C; C03C12/00; C03C12/02; C03C3/00; C03C3/12; C03C3/14; C03C3/145
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
40 words
A GLASS BEAD COMPOSITION HAVING A REFRACTIVE INDEX OF ABOUT 1.82 TO 1.99 AND CONSISTING ASSENTIALLY OF ABOUT 49% TO 6:5% BARIUM OXIDE, 2/% TO 40% TITANIUM DIOXIDE, 6% TO 14% BORON OXIDE, AND 1% TO 11% ALUMINA BY WEIGHT.
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) | 1965-06-25 | 1965-12-25 | 1966-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-25 | 1969-12-25 | 1970-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-25 | 1973-12-25 | 1974-06-26 | $7700.00 | Window Closed / Lapsed |