Patent US3291650A successfully refreshed from Google Patents.
US3291650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control of crystal size
Assignee: Motors Liquidation Co
•
Filing: 1963-12-23
•
Granted: 1966-12-13
•
Expires: 1983-12-23
Abstract
No abstract record available.
Inventors
- 👤 Hubert G Dohmen
- 👤 Herbert A Sims
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:25
CPC Classifications
C; C30; C30B; C30B15/00; C30B15/20; C30B15/22; C30B15/26; C30B15/24; Y; Y10; Y10T; Y10T117/00; Y10T117/10; Y10T117/1004; Y10T117/1008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
179 words
THE METHOD OF GROWING A MONOCRYSTALLINE BODY OF ACCURATELY CONTROLLED ACROSS SECTION WHICH COMPRISES THE STEPS OF FORMING A MELT FOR GROWING MONOCRYSTALS, FORCING A DOMICAL PROJECTION OF THE MELT THROUGH AN APERTURE IN A MEMBER CONTACTING A SURFACE OF THE MELT, CONTACTING SAID DOMICAL PROJECTION WITH A SEED CRYSTAL TO ESTABLISH A MELT ZONE HAVING A SURFACE EXTENDING BETWEEN THE SEED CRYSTAL AND THE UPPER SURFACE OF SAID APERTURED MEMBER, DIRECTING A LIGHT BEAM INTO THE SURFACE OF SAID MELT ZONE TO PRODUCE A REFLECTED BEAM OF LIGHT HAVING AN ANGLE OF REFLECTION THEREBETWEEN, PULLING A SINGLE CRYSTAL FROM SAID MELT BY PROGRESSIVE UNICRYSTALLINE SOLIDIFICATION FROM SAID MELT ONTO SAID SEED CRYSTAL AT ITS CONTACT AREA WITH SAID MELT ZONE AND, AFTER INITIAL CRYSTAL GROWTH, MAINTAINING SAID ANGLE OF REFLECTION AT A PREDETERMINED VALUE DURING CRYSTAL GROWTH BY ADJUSTING ANY ONE OR MORE CRYSTAL GROWTH CONDITIONS SUCH AS MELT TEMPERATURE, RATE OF PULL, INCLINATION OF PULL AXIS, LOCATION OF PULL AXIS IN SAD MELT ZONE, LOCATION OF THE MELT ZONE IN THE MELT HEAT FIELD, AND MELT TEMPERATURE.
Claim 2
Independent Claim
179 words
THE METHOD OF GROWING A MONOCRYSTALLINE BODY OF ACCURATELY CONTROLLED ACROSS SECTION WHICH COMPRISES THE STEPS OF FORMING A MELT FOR GROWING MONOCRYSTALS, FORCING A DOMICAL PROJECTION OF THE MELT THROUGH AN APERTURE IN A MEMBER CONTACTING A SURFACE OF THE MELT, CONTACTING SAID DOMICAL PROJECTION WITH A SEED CRYSTAL TO ESTABLISH A MELT ZONE HAVING A SURFACE EXTENDING BETWEEN THE SEED CRYSTAL AND THE UPPER SURFACE OF SAID APERTURED MEMBER, DIRECTING A LIGHT BEAM INTO THE SURFACE OF SAID MELT ZONE TO PRODUCE A REFLECTED BEAM OF LIGHT HAVING AN ANGLE OF REFLECTION THEREBETWEEN, PULLING A SINGLE CRYSTAL FROM SAID MELT BY PROGRESSIVE UNICRYSTALLINE SOLIDIFICATION FROM SAID MELT ONTO SAID SEED CRYSTAL AT ITS CONTACT AREA WITH SAID MELT ZONE AND, AFTER INITIAL CRYSTAL GROWTH, MAINTAINING SAID ANGLE OF REFLECTION AT A PREDETERMINED VALUE DURING CRYSTAL GROWTH BY ADJUSTING ANY ONE OR MORE CRYSTAL GROWTH CONDITIONS SUCH AS MELT TEMPERATURE, RATE OF PULL, INCLINATION OF PULL AXIS, LOCATION OF PULL AXIS IN SAD MELT ZONE, LOCATION OF THE MELT ZONE IN THE MELT HEAT FIELD, AND MELT TEMPERATURE.
References Cited (Backward Citations)
US2979386A
Cited
US2927008A
Cited
US3002824A
Cited
US2890139A
Cited
US2916593A
Cited
US3078151A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |