US2935385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for manufacturing semiconductor materials
Assignee: Texas Instruments Inc
•
Filing: 1955-03-25
•
Granted: 1960-05-03
•
Expires: 1975-03-25
Abstract
No abstract record available.
Inventors
- 👤 Cornelison Boyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:15
CPC Classifications
C; C30; C30B; C30B15/00; C30B15/30; Y; Y10; Y10T; Y10T117/00; Y10T117/10; Y10T117/1024; Y10T117/1032; Y10T117/1072; Y10T74/00; Y10T74/15; Y10T74/1503; Y10T74/1508; Y10T74/1511; Y10T74/1513
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
IN AN APPARATUS FOR PRODUCING SINGLE CRYSTALS OF SEMICONDUCTOR MATERIAL, A MECHANISM FOR DRIVING THE CRYSTAL SEED SUPPORT AND WITHDRAWAL MEANS AT A CONTINUOUSLY VARIABLE CONTROLLABLE SPEED COMPRISING IN COMBINATION A SYNCHRONOUS MOTOR, A CONTINUOUSLY VARIABLE RATIO TRANSMISSION MEANS DRIVENN BY SAID MOTOR AND DRIVING THE CRYSTAL SEED SUPPORT AND WITHDRAWAL MEANS, AND A SERVOMECHANISM CONTROLLING THE TRANSMISSION RATIO OF SAID TRANSMISSION MEANS, SAID TRANSMISSION MEANS COMPRISING AN INPUT SHAFT, A PLURALITY OF DISCS KEYED TO SAID INPUT SHAFT, A PLURALITY OF UNDIRECTIONAL CLUTCHES EACH
Claim 2
Dependent Claim
85 words
IN AN APPARATUS FOR PRODUCING SINGLE CRYSTALS OF SEMICONDUCTOR MATERIAL, A MECHANISM FOR DRIVING THE CRYSTAL SEED SUPPORT AND WITHDRAWAL MEANS AT A CONTINUOUSLY VARIABLE CONTROLLABLE SPEED COMPRISING IN COMBINATION A SYNCHRONOUS MOTOR, A CONTINUOUSLY VARIABLE RATIO TRANSMISSION MEANS DRIVENN BY SAID MOTOR AND DRIVING THE CRYSTAL SEED SUPPORT AND WITHDRAWAL MEANS, AND A SERVOMECHANISM CONTROLLING THE TRANSMISSION RATIO OF SAID TRANSMISSION MEANS, SAID TRANSMISSION MEANS COMPRISING AN INPUT SHAFT, A PLURALITY OF DISCS KEYED TO SAID INPUT SHAFT, A PLURALITY OF UNDIRECTIONAL CLUTCHES EACH
References Cited (Backward Citations)
US1968030A
Cited
US1911156A
Cited
US2508639A
Cited
US2683676A
Cited
US2768914A
Cited
US2692510A
Cited
US2807764A
Cited
US2743200A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |