US2608031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame glossing rod-shaped single crystals of corundum
Assignee: Union Carbide Corp
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Filing: 1946-04-16
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Granted: 1952-08-26
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Expires: 1966-04-16
Abstract
No abstract record available.
Inventors
- 👤 Malcolm H Barnes
- 👤 Edward L Mccandless
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:39
CPC Classifications
C; C30; C30B; C30B29/00; C30B29/10; C30B29/16; C30B29/22; C30B29/26; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/298
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
84 words
A PROCESS FOR GLOSSING A UNICRYSTALLINE THIN ROD OF CORUNDUM COMPRISING SELECTING SUCH A ROD WHEREIN THE ANGLE BETWEEN THE LONGITUDINAL AND OPTIC AXES THEREOF IS BETWEEN ZERO AND 65 DEGREES, FUSING A THIN LAYER OF SUCH ROD INCLUDING THE SURFACE THEREOF BY APPLYING FLAME LATERALLY AGANIST SAID ROD AND HEATING SAID SURFACE THEREWITH TO A TEMPERATURE OF ABOUT 2050* C. WHILE RETAINING THE INTERIOR OF SAID ROD IN A SOLID CONDITION, AND THEN RESOLIDIFYING SAID LAYER TO FORM A SMOOTH GLOSSY NOTCHLESS SURFACE.
Claim 2
Dependent Claim
84 words
A PROCESS FOR GLOSSING A UNICRYSTALLINE THIN ROD OF CORUNDUM COMPRISING SELECTING SUCH A ROD WHEREIN THE ANGLE BETWEEN THE LONGITUDINAL AND OPTIC AXES THEREOF IS BETWEEN ZERO AND 65 DEGREES, FUSING A THIN LAYER OF SUCH ROD INCLUDING THE SURFACE THEREOF BY APPLYING FLAME LATERALLY AGANIST SAID ROD AND HEATING SAID SURFACE THEREWITH TO A TEMPERATURE OF ABOUT 2050* C. WHILE RETAINING THE INTERIOR OF SAID ROD IN A SOLID CONDITION, AND THEN RESOLIDIFYING SAID LAYER TO FORM A SMOOTH GLOSSY NOTCHLESS SURFACE.
Claim 3
Dependent Claim
65 words
A UNICRYSTALLINE SYNTHETIC CORUNDUM ROD GROWN IN ROD FORM AND NOT EXCEEDING THREE SIXTEENTH INCH IN DIAMETER, SAID ROD HAVING AN OPTIC ORIENTATION BETWEEN ZERO AND 65 DEGREES AND HAVING A SMOOTH, GLOSSY, CLEAR, NOTCHLESS HEAT GLOSSED SURFACE OVER ITS FULL CIRCUMFERENCE AND EXTENDING ALONG AT LEAST THE MAJOR PORTION OF ITS LENGTH, SAID SURFACE APPEARING TO BE COMPLETELY SCRATCH-FREE AT A MAGNIFICATION OF 2500X.
Claim 4
Dependent Claim
65 words
A UNICRYSTALLINE SYNTHETIC CORUNDUM ROD GROWN IN ROD FORM AND NOT EXCEEDING THREE SIXTEENTH INCH IN DIAMETER, SAID ROD HAVING AN OPTIC ORIENTATION BETWEEN ZERO AND 65 DEGREES AND HAVING A SMOOTH, GLOSSY, CLEAR, NOTCHLESS HEAT GLOSSED SURFACE OVER ITS FULL CIRCUMFERENCE AND EXTENDING ALONG AT LEAST THE MAJOR PORTION OF ITS LENGTH, SAID SURFACE APPEARING TO BE COMPLETELY SCRATCH-FREE AT A MAGNIFICATION OF 2500X.
References Cited (Backward Citations)
GB243251A
Cited
US1680681A
Cited
US1852840A
Cited
US2018056A
Cited
US2011872A
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US2405892A
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US2371486A
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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) | 1955-08-26 | 1956-02-25 | 1956-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-26 | 1960-02-25 | 1960-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-26 | 1964-02-25 | 1964-08-26 | $7700.00 | Window Closed / Lapsed |