Patent US2838408A successfully refreshed from Google Patents.
US2838408A
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Glass compositions
Assignee: Prismo Safety Corp
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Filing: 1955-01-28
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Granted: 1958-06-10
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Expires: 1975-01-28
Abstract
No abstract record available.
Inventors
- 👤 Guy E Rindone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:19
CPC Classifications
C; C03; C03C; C03C12/00; C03C12/02; C03C3/00; C03C3/04; C03C3/062; C03C3/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
TRANSPARENT WEATHER-RESISTANT SMALL GLASS BEADS HAVING A REFRACTIVE INDEX OF AT LEAST 1.90 AND A COMPOSITION CONSISTING ESSENTIALLY OF THE FOLLOWING MOL PERCENT:
Claim 2
Dependent Claim
23 words
TRANSPARENT WEATHER-RESISTANT SMALL GLASS BEADS HAVING A REFRACTIVE INDEX OF AT LEAST 1.90 AND A COMPOSITION CONSISTING ESSENTIALLY OF THE FOLLOWING MOL PERCENT:
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) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |