US3033660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for drawing crystals from a melt
Assignee: US Philips Corp
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Filing: 1960-04-06
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Granted: 1962-05-08
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Expires: 1980-04-06
Abstract
No abstract record available.
Inventors
- 👤 Okkerse Boudewijn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:45
CPC Classifications
C; C30; C30B; C30B15/00; C30B15/10; C30B15/12; C30B15/20; C30B15/22; Y; Y10; Y10T; Y10T117/00; Y10T117/10; Y10T117/1024; Y10T117/1032; Y10T117/1052; Y10T117/1068
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A METHOD OF DRAWING CRYSTALS FROM A MELT CONTAINED IN A CRUCIBLE HAVING BOTTOM AND SIDE WALL PORTIONS AND A PROJECTION EXTENDING UPWARDLY FROM THE BOTTOM WALL WITHIN AND SPACED FROM THE SAID SIDE WALLS AND WHOSE UPPER EXTREMITY POSSESSES A GIVEN DIAMETER, COMPRISING THE STEPS OF MAINTAINING THE MELT WITHIN THE CRUCIBLE AT A LEVEL ABOVE THE UPPER EXTREMITY OF THE PROJECTION, AND DRAWING A CRYSTAL UPWARDS FROM A REGION OF THE MELT LYING OVER THE SAID EXTREMITY.
Claim 2
Independent Claim
79 words
A METHOD OF DRAWING CRYSTALS FROM A MELT CONTAINED IN A CRUCIBLE HAVING BOTTOM AND SIDE WALL PORTIONS AND A PROJECTION EXTENDING UPWARDLY FROM THE BOTTOM WALL WITHIN AND SPACED FROM THE SAID SIDE WALLS AND WHOSE UPPER EXTREMITY POSSESSES A GIVEN DIAMETER, COMPRISING THE STEPS OF MAINTAINING THE MELT WITHIN THE CRUCIBLE AT A LEVEL ABOVE THE UPPER EXTREMITY OF THE PROJECTION, AND DRAWING A CRYSTAL UPWARDS FROM A REGION OF THE MELT LYING OVER THE SAID EXTREMITY.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-07 | 1965-11-06 | 1966-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-07 | 1969-11-06 | 1970-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-07 | 1973-11-06 | 1974-05-08 | $7700.00 | Window Closed / Lapsed |