US3159408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chuck
Assignee: WR Grace and Co
•
Filing: 1961-10-05
•
Granted: 1964-12-01
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Expires: 1981-10-05
Abstract
No abstract record available.
Inventors
- 👤 Moises G Sanchez
- 👤 Vernon R Hoover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:20
CPC Classifications
C; C30; C30B; C30B13/00; C30B13/28; C30B13/285; Y; Y10; Y10S; Y10S117/00; Y10S117/911; Y10T; Y10T279/00; Y10T279/17; Y10T279/17231; Y10T279/35
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
IN CHUCK FOR ALIGNING AND SECURELY HOLDING THE BODY OF A SEMICONDUCTOR MATERIAL DURING THE FLOATING-ZONE REFINING OF SAID SEMICONDUCTOR MATERIAL SAID CHUCK COMPRISING A SHAFT HAVING AT ONE END A WIDENED BASE PORTION, A CUP BELOW SAID BASE PORTION ADAPTED TO RECEIVE THE END OF SAID SEMICONDUCTOR MATERIAL TO BE HELD IN THE CHUCK ASSEMBLY, A PLURALITY OF ARMS PIVOTALLY CONNECTED TO SAID BASE PORTION AND EXTENDING ABOVE SAID BASE PORTION AND AT LEAST BELOW SAID CUP; ADJUSTING MEANS AT UPPER EXTENSION OF SAID ARMS FOR VARYING THE DISTANCE BETWEEN THE ENDS OF THE ARMS AND THE CENTERLINE OF SAID SHAFT, AND GRIPPING MEANS PIVOTALLY CONNECTED TO THE LOWER EXTENSION OF SAID ARMS BELOW THE CUP, THE IMPROVEMENT IN WHICH SAID CUP AND SAID GRIPPING MEANS CONSISTS OF TANTALUM.
Claim 2
Dependent Claim
130 words
IN CHUCK FOR ALIGNING AND SECURELY HOLDING THE BODY OF A SEMICONDUCTOR MATERIAL DURING THE FLOATING-ZONE REFINING OF SAID SEMICONDUCTOR MATERIAL SAID CHUCK COMPRISING A SHAFT HAVING AT ONE END A WIDENED BASE PORTION, A CUP BELOW SAID BASE PORTION ADAPTED TO RECEIVE THE END OF SAID SEMICONDUCTOR MATERIAL TO BE HELD IN THE CHUCK ASSEMBLY, A PLURALITY OF ARMS PIVOTALLY CONNECTED TO SAID BASE PORTION AND EXTENDING ABOVE SAID BASE PORTION AND AT LEAST BELOW SAID CUP; ADJUSTING MEANS AT UPPER EXTENSION OF SAID ARMS FOR VARYING THE DISTANCE BETWEEN THE ENDS OF THE ARMS AND THE CENTERLINE OF SAID SHAFT, AND GRIPPING MEANS PIVOTALLY CONNECTED TO THE LOWER EXTENSION OF SAID ARMS BELOW THE CUP, THE IMPROVEMENT IN WHICH SAID CUP AND SAID GRIPPING MEANS CONSISTS OF TANTALUM.
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) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |