US3113877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Partially devitrified glasses
Assignee: International Resistance Co
•
Filing: 1960-10-06
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Granted: 1963-12-10
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Expires: 1980-10-06
Abstract
No abstract record available.
Inventors
- 👤 Bhogaraju V Janakirama-Rao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:11
CPC Classifications
C; C03; C03C; C03C10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A PARTIALLY DEVITRIFIED GLASS CONSISTING ESSENTIALLY OF BY WEIGHT 5 TO 65% SILICA, 0 TO 55% POTASH AND A NUCLEATING AGENT SELECTED FROM THE GROUP CONSISTING OF 35 TO 55% TITANIUM OXIDE, 35 TO 75% NIOBIUM OXIDE AND 35 TO 70% TANTALUM OXIDE.
Claim 2
Dependent Claim
43 words
A PARTIALLY DEVITRIFIED GLASS CONSISTING ESSENTIALLY OF BY WEIGHT 5 TO 65% SILICA, 0 TO 55% POTASH AND A NUCLEATING AGENT SELECTED FROM THE GROUP CONSISTING OF 35 TO 55% TITANIUM OXIDE, 35 TO 75% NIOBIUM OXIDE AND 35 TO 70% TANTALUM OXIDE.
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) | 1966-12-09 | 1967-06-10 | 1967-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-09 | 1971-06-10 | 1971-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-09 | 1975-06-10 | 1975-12-10 | $7700.00 | Window Closed / Lapsed |