US3125329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Norman
Assignee: —
•
Filing: —
•
Granted: 1964-03-17
•
Expires: 1981-03-17
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:10
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/08; C03B37/081
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A REFRACTORY CRUCIBLE FOR MELTING GLASS MARBLES OF A PREDETERMINED DIAMETER COMPRISING: A BASE PORTION DEFINING A PLURALITY OF APERTURES FOR WITHDRAWING MOLTEN GLASS, SAID BASE PORTION HAVING A DIAMETER ADAPTED TO BE GREATER THAN THE SAID PREDETERMINED DIAMETER OF SAID MARBLES; A LOWER SIDE WALL PORTION EXTENDING GENERALLY UPRIGHT FROM SAID BASE; AN UPPER SIDE WALL PORTION DEFINING AN INLET OPENING HAVING A DIAMETER ADAPTED TO BE GREATER THAN SAID PREDETERMINED DIAMETER OF SAID MARBLES BUT LESS THAN THE DIAMETER OF SAID LOWER WALL PORTION; AN INTERMEDIATE WALL PORTION FORMING A TRANSITIONAL ZONE BETWEEN SAID LOWER AND UPPER WALL PORTIONS; AND A METALLIC LINER HAVING AN OUTSIDE DIAMETER SUBSTANTIALLY EQUAL TO THE INSIDE DIAMETER OF SAID UPPER SIDE WALL PORTION AND EXTENDING AT LEAST INTO SAID TRANSITIONAL ZONE, SAID LINER HAVING ITS LOWER TERMINAL PORTION IN SPACED RELATIONSHIP WITH THE SIDE WALLS OF SAID CRUCIBLE.
Claim 2
Dependent Claim
146 words
A REFRACTORY CRUCIBLE FOR MELTING GLASS MARBLES OF A PREDETERMINED DIAMETER COMPRISING: A BASE PORTION DEFINING A PLURALITY OF APERTURES FOR WITHDRAWING MOLTEN GLASS, SAID BASE PORTION HAVING A DIAMETER ADAPTED TO BE GREATER THAN THE SAID PREDETERMINED DIAMETER OF SAID MARBLES; A LOWER SIDE WALL PORTION EXTENDING GENERALLY UPRIGHT FROM SAID BASE; AN UPPER SIDE WALL PORTION DEFINING AN INLET OPENING HAVING A DIAMETER ADAPTED TO BE GREATER THAN SAID PREDETERMINED DIAMETER OF SAID MARBLES BUT LESS THAN THE DIAMETER OF SAID LOWER WALL PORTION; AN INTERMEDIATE WALL PORTION FORMING A TRANSITIONAL ZONE BETWEEN SAID LOWER AND UPPER WALL PORTIONS; AND A METALLIC LINER HAVING AN OUTSIDE DIAMETER SUBSTANTIALLY EQUAL TO THE INSIDE DIAMETER OF SAID UPPER SIDE WALL PORTION AND EXTENDING AT LEAST INTO SAID TRANSITIONAL ZONE, SAID LINER HAVING ITS LOWER TERMINAL PORTION IN SPACED RELATIONSHIP WITH THE SIDE WALLS OF SAID CRUCIBLE.
References Cited (Backward Citations)
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US2255578A
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US2190296A
Cited
US2276295A
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US2495956A
Cited
US2814657A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-17 | 1967-09-16 | 1968-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-17 | 1971-09-16 | 1972-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-17 | 1975-09-16 | 1976-03-17 | $7700.00 | Window Closed / Lapsed |