US3231337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the preparation of semiconductor material
Assignee: Merck and Co Inc
•
Filing: 1963-10-29
•
Granted: 1966-01-25
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Expires: 1983-10-29
Abstract
No abstract record available.
Inventors
- 👤 Henry R Barkemeyer
- 👤 William J Mcaleer
- 👤 Peter I Pollak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:44
CPC Classifications
C; C30; C30B; C30B25/00; C30B25/02; C30B29/00; C30B29/10; C30B29/40; Y; Y10; Y10S; Y10S148/00; Y10S148/006; Y10S148/119
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
APPARATUS FOR THE FORMATION OF BULK SEMICONDUCTOR MATERIAL OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
12 words
APPARATUS FOR THE FORMATION OF BULK SEMICONDUCTOR MATERIAL OF THE GENERAL FORMULA:
References Cited (Backward Citations)
US2831784A
Cited
US3095279A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |