US3591346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing crystals and crystals manufactured by such methods
Assignee: US Philips Corp
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Filing: 1968-08-06
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Granted: 1971-07-06
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Expires: 1988-08-06
Abstract
Abstract LARGE CRYSTALS ARE FORMED FROM A FLUID CONTAINING CRYSTAL FORMING MATERIAL BY PERIODICALLY DEPOSITING CRYSTALLINE MATERIAL FROM THE FLUID AND TRANSFERRING PART OF THE DEPOSITED MATERIAL BACK INTO THE FLUID AND AWAY FROM THE AREA OF DEPOSITION, THE AMOUNT OF CRYSTAL MATERIAL DEPOSITED IN THE DEPOSITION PART OF THE CYCLE BEING GREATER THAN THE AMOUNT OF CRYSTAL MATERIAL TRANSFERRED TO THE FLUID DURING EACH PERIOD. BY THIS MEANS THE GROWTH OF LARGE CRYSTALS IS INCREASED AT THE EXPENSE OF THE GROWTH AND FORMATION OF SMALL CRYSTALS.
Inventors
- 👤 Rudolf Wilhelm Julius Kluckow
- 👤 Heinz Scholz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:41
CPC Classifications
C; C30; C30B; C30B25/00; C30B29/00; C30B29/10; C30B29/16; C30B29/40; C30B29/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |