US3539883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antireflection coatings for semiconductor devices
Assignee: Ion Physics Corp
•
Filing: 1967-03-15
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Granted: 1970-11-10
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Expires: 1987-03-15
Abstract
No abstract record available.
Inventors
- 👤 Stanley Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:46
CPC Classifications
H; H10; H10F; H10F77/00; H10F77/30; H10F77/306; H10F77/311; H10F77/315; H10W; H10W74/00; H10W74/40; H10W74/43; Y; Y02; Y02E; Y02E10/00; Y02E10/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3047439A
Cited
US3391308A
Cited
GB951859A
Cited
US3293513A
Cited
US3248669A
Cited
US3390022A
Cited
US3350595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |