US3520722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fabrication of semiconductive devices with silicon nitride coatings
Assignee: RCA Corp
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Filing: 1967-05-10
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Granted: 1970-07-14
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Expires: 1987-05-10
Abstract
No abstract record available.
Inventors
- 👤 Joseph H Scott Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:34
CPC Classifications
H; H10; H10P; H10P14/00; H10P14/60; H10P14/66; H10P14/668; H10P14/6681; H10P14/6682; H10P14/63; H10P14/6326; H10P14/6328; H10P14/6334; H10P14/69; H10P14/694; H10P14/6943; H10P14/69433; Y; Y10; Y10S; Y10S148/00; Y10S148/003; Y10S148/114
Claims Analysis
Total Claims: 0
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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) | 1973-07-13 | 1974-01-12 | 1974-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-13 | 1978-01-12 | 1978-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-13 | 1982-01-12 | 1982-07-14 | $7700.00 | Window Closed / Lapsed |