US3429080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition for polishing crystalline silicon and germanium and process
Assignee: Tizon Chemical Corp
•
Filing: 1966-05-02
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Granted: 1969-02-25
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Expires: 1986-05-02
Abstract
No abstract record available.
Inventors
- 👤 Raymond L Lachapelle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:19
CPC Classifications
H; H10; H10P; H10P52/00; H10P52/40; H10P52/402; C; C09; C09K; C09K3/00; C09K3/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1452093A
Cited
US1863002A
Cited
US2694004A
Cited
US3071456A
Cited
US2955030A
Cited
US3131039A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |