US2980547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High refractive index glass beads
Assignee: Flex-O-Lite Manuf Corp
•
Filing: 1957-05-03
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Granted: 1961-04-18
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Expires: 1977-05-03
Abstract
No abstract record available.
Inventors
- 👤 D Adrian Vincent L Duval
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:49
CPC Classifications
C; C03; C03C; C03C12/00; C03C12/02; C03C3/00; C03C3/12; C03C3/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
A REFLECTIVE SUBSTANTIALLY TRANSPARENT SPHERICAL GLASS BEAD CONSISTING ESSENTIALLY OF ABOUT 54-58% BY WEIGHT OF BARIUM OXIDE, ABOUT 10-12% BY WEIGHT OF BORIC OXIDE AND ABOUT 31-34% BY WEIGHT OF TITANIUM DIOXIDE.
Claim 2
Dependent Claim
32 words
A REFLECTIVE SUBSTANTIALLY TRANSPARENT SPHERICAL GLASS BEAD CONSISTING ESSENTIALLY OF ABOUT 54-58% BY WEIGHT OF BARIUM OXIDE, ABOUT 10-12% BY WEIGHT OF BORIC OXIDE AND ABOUT 31-34% BY WEIGHT OF TITANIUM DIOXIDE.
References Cited (Backward Citations)
US2472447A
Cited
US2713286A
Cited
US2702749A
Cited
US2790723A
Cited
US2726161A
Cited
US2839408A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |