Patent US849758A successfully refreshed from Google Patents.
Patent US2994593A successfully refreshed from Google Patents.
US2994593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystal growing apparatus
Assignee: AT&T Inc
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Filing: 1958-09-19
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Granted: 1961-08-01
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Expires: 1978-09-19
Abstract
No abstract record available.
Inventors
- 👤 Richard A Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:01
CPC Classifications
C; C30; C30B; C30B29/00; C30B29/10; C30B29/16; C30B29/18; B; B01; B01D; B01D9/00; B01D9/0036; C30B19/00; C30B19/06; C30B19/068; C30B7/00; C30B7/10; Y; Y10; Y10S; Y10S117/00; Y10S117/90; Y10S117/911; Y10T; Y10T117/00; Y10T117/10; Y10T117/1024; Y10T117/1096
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
AN ASSEMBLY FOR SUPPORTING A PLURALITY OF CRYSTAL SEED PLATES IN A VERTICALLY DISPOSED CYLINDRICALLY CHAMBERED CRYSTAL GROWING REGION OF A SYNTHETIC CRYSTAL GROWING APPARATUS HAVING A NUTRIENT DISSOLVING REGION BELOW THE GROWING REGION, WHICH COMPRISES, A CIRCULAR BOTTOM PLATE WITH ONE CENTRAL APERTURE AND A PLURALITY OF PERIPHERAL APERTURES THEREIN FOR THE PASSAGE OF NUTRIENT SOLUTION THERETHROUGH, A FLAT RING TOP MEMBER DISPOSED PARALLEL TO THE BOTTOM PLATE, AT LEAST ONE PAIR OF OPPOSING, PARALLEL, VERTICAL GUIDE RODS INTERCONNECTING THE PLATE AND TOP MEMBER, AT LEAST ONE UNITARY REMOVABLE SEED PLATE HOLDER SLIDABLY ENGAGING A PAIR OF THE RODS AND SUPPORTED BY THE BOTTOM PLATE, THE HOLDER COMPRISING ADJUSTABLY PARALLEL SPACED UPPER AND LOWER SEED PLATE SUPPORTS AND A PLURALITY OF SEED PLATE RETAINERS REMOVABLY MOUNTED ON EACH SUPPORT AND TANGS FOR ENGAGING THE END OF A SEED PLATE
Claim 2
Dependent Claim
140 words
AN ASSEMBLY FOR SUPPORTING A PLURALITY OF CRYSTAL SEED PLATES IN A VERTICALLY DISPOSED CYLINDRICALLY CHAMBERED CRYSTAL GROWING REGION OF A SYNTHETIC CRYSTAL GROWING APPARATUS HAVING A NUTRIENT DISSOLVING REGION BELOW THE GROWING REGION, WHICH COMPRISES, A CIRCULAR BOTTOM PLATE WITH ONE CENTRAL APERTURE AND A PLURALITY OF PERIPHERAL APERTURES THEREIN FOR THE PASSAGE OF NUTRIENT SOLUTION THERETHROUGH, A FLAT RING TOP MEMBER DISPOSED PARALLEL TO THE BOTTOM PLATE, AT LEAST ONE PAIR OF OPPOSING, PARALLEL, VERTICAL GUIDE RODS INTERCONNECTING THE PLATE AND TOP MEMBER, AT LEAST ONE UNITARY REMOVABLE SEED PLATE HOLDER SLIDABLY ENGAGING A PAIR OF THE RODS AND SUPPORTED BY THE BOTTOM PLATE, THE HOLDER COMPRISING ADJUSTABLY PARALLEL SPACED UPPER AND LOWER SEED PLATE SUPPORTS AND A PLURALITY OF SEED PLATE RETAINERS REMOVABLY MOUNTED ON EACH SUPPORT AND TANGS FOR ENGAGING THE END OF A SEED PLATE
References Cited (Backward Citations)
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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) | 1964-07-31 | 1965-01-30 | 1965-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-31 | 1969-01-30 | 1969-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-31 | 1973-01-30 | 1973-08-01 | $7700.00 | Window Closed / Lapsed |