US3497407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Etching of semiconductor coatings of sio2
Assignee: International Business Machines Corp
•
Filing: 1966-12-28
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Granted: 1970-02-24
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Expires: 1986-12-28
Abstract
No abstract record available.
Inventors
- 👤 Ronald P Esch
- 👤 William A Pliskin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:48
CPC Classifications
H; H10; H10W; H10W74/00; H10W74/40; H10W74/43; H10P; H10P50/00; H10P50/20; H10P50/28; H10P50/282; H10P50/283; H10W20/00; H10W20/40; Y; Y10; Y10S; Y10S148/00; Y10S148/043; Y10S148/051; Y10S148/173
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3107188A
Cited
US3226611A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-23 | 1973-08-25 | 1974-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-23 | 1977-08-25 | 1978-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-23 | 1981-08-25 | 1982-02-24 | $7700.00 | Window Closed / Lapsed |