US3420704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Depositing semiconductor films utilizing a thermal gradient
Assignee: National Aeronautics and Space Administration
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Filing: 1966-08-19
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Granted: 1969-01-07
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Expires: 1986-08-19
Abstract
No abstract record available.
Inventors
- 👤 Robert L Ramey
- 👤 William D Mclennan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:34
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/54; C23C14/541; Y; Y10; Y10S; Y10S148/00; Y10S148/169; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3160522A
Cited
US3335038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |