US2948082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making synthetic quartz cat's-eye gem
Assignee: Individual
•
Filing: 1957-12-26
•
Granted: 1960-08-09
•
Expires: 1977-12-26
Abstract
No abstract record available.
Inventors
- 👤 Watson John Estell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:23
CPC Classifications
C; C30; C30B; C30B29/00; C30B29/10; C30B29/16; C30B29/22; C30B29/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
THAT METHOD OF MAKING A CAT''S-EYE GEM WHICH COMPRISES DRAWING A ROD FROM MOLTEN QUARTZ HAVING GAS BUBBLES THEREIN TO PRODUCE A ROD HAVING CAPILLARIES THEREIN PARALLEL TO EACH OTHER AND PARALLEL TO THE AXIS OF THE ROD, CUTTING A TRANSVERSE SECTION FROM THE ROD AND GRINDING A CONVEX SURFACE FROM SUCH SECTION AND THEREAFTER POLISHING THE CONVEX SURFACE.
Claim 2
Dependent Claim
59 words
THAT METHOD OF MAKING A CAT''S-EYE GEM WHICH COMPRISES DRAWING A ROD FROM MOLTEN QUARTZ HAVING GAS BUBBLES THEREIN TO PRODUCE A ROD HAVING CAPILLARIES THEREIN PARALLEL TO EACH OTHER AND PARALLEL TO THE AXIS OF THE ROD, CUTTING A TRANSVERSE SECTION FROM THE ROD AND GRINDING A CONVEX SURFACE FROM SUCH SECTION AND THEREAFTER POLISHING THE CONVEX SURFACE.
References Cited (Backward Citations)
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US1737662A
Cited
US2272342A
Cited
US2241365A
Cited
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US2663171A
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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) | 1963-08-09 | 1964-02-08 | 1964-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-09 | 1968-02-08 | 1968-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-09 | 1972-02-08 | 1972-08-09 | $7700.00 | Window Closed / Lapsed |