US2774675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass composition
Assignee: Owens Corning
•
Filing: 1953-02-25
•
Granted: 1956-12-18
•
Expires: 1973-02-25
Abstract
No abstract record available.
Inventors
- 👤 Slayter Games
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:33
CPC Classifications
C; C03; C03C; C03C13/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
32 words
A GLASS COMPOSITION CONSISTING ESSENTIALLY OF FROM 40 TO 50 PARTS BY WEIGHT ALUMINA, FROM 35 TO 50 PARTS BY WEIGHT CALCIA, AND FROM 5 TO 20 PARTS BY WEIGHT TIN OXIDE.
Claim 2
Dependent Claim
32 words
A GLASS COMPOSITION CONSISTING ESSENTIALLY OF FROM 40 TO 50 PARTS BY WEIGHT ALUMINA, FROM 35 TO 50 PARTS BY WEIGHT CALCIA, AND FROM 5 TO 20 PARTS BY WEIGHT TIN OXIDE.
Claim 3
Dependent Claim
8 words
THE COMPOSITION OF CLAIM 1 IN FIBROUS FORM.
References Cited (Backward Citations)
GB165052A
Cited
US1736642A
Cited
US2090098A
Cited
US2240327A
Cited
US2172839A
Cited
GB495654A
Cited
US2252495A
Cited
US2486812A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |