US3300670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Table xiv
Assignee: —
•
Filing: 1962-02-28
•
Granted: 1967-01-24
•
Expires: 1982-02-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:36
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/11; C03C3/112; C03C21/00; C03C4/00; C03C4/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A GLASS BODY HAVING AN INTEGRAL SURFACE LAYER COMPRISING INORGANIC CRYSTALS, SAID CRYSTALS BEING FORMED BY IN SITU CRYSTALLIZATION FROM A SURFACE PORTION OF THE GLASS OF SAID BODY, SAID GLASS CONSISTING ESSENTIALLY OF INORGANIC CONSTITUENTS, SAID CRYSTALS OF SAID LAYER BEING DISPERSED IN A GLASSY MATRIX WHICH CONSISTS ESSENTIALLY OF THE UNCRYSTALLIZED PORTION OF SAID SURFACE PORTION OF GLASS OF SAID BODY, SAID CRYSTALS IN SAID INTEGRAL SURFACE LAYER CONTAINING AN ACTIVATOR RENDERING SAID CRYSTALS LUMINESCENT, SAID BODY OTHER THAN SAID INTEGRAL SURFACE LAYER BEING AN ESSENTIALLY VITREOUS, NONCRYSTALLINE BODY OF GLASS.
Claim 2
Dependent Claim
93 words
A GLASS BODY HAVING AN INTEGRAL SURFACE LAYER COMPRISING INORGANIC CRYSTALS, SAID CRYSTALS BEING FORMED BY IN SITU CRYSTALLIZATION FROM A SURFACE PORTION OF THE GLASS OF SAID BODY, SAID GLASS CONSISTING ESSENTIALLY OF INORGANIC CONSTITUENTS, SAID CRYSTALS OF SAID LAYER BEING DISPERSED IN A GLASSY MATRIX WHICH CONSISTS ESSENTIALLY OF THE UNCRYSTALLIZED PORTION OF SAID SURFACE PORTION OF GLASS OF SAID BODY, SAID CRYSTALS IN SAID INTEGRAL SURFACE LAYER CONTAINING AN ACTIVATOR RENDERING SAID CRYSTALS LUMINESCENT, SAID BODY OTHER THAN SAID INTEGRAL SURFACE LAYER BEING AN ESSENTIALLY VITREOUS, NONCRYSTALLINE BODY OF GLASS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |