Patent US3141849A successfully refreshed from Google Patents.
US3141849A
Expired / Lapsed
US
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Process for doping materials
Assignee: Wacker Chemie AG
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Filing: 1961-06-29
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Granted: 1964-07-21
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Expires: 1981-06-29
Abstract
No abstract record available.
Inventors
- 👤 Enk Eduard
- 👤 Nickl Julius
- 👤 Silbernagl Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:34
CPC Classifications
C; C30; C30B; C30B13/00; C30B13/08; C30B13/10; Y; Y10; Y10S; Y10S117/00; Y10S117/90; Y10S148/00; Y10S148/041; Y10S148/134; Y10S252/00; Y10S252/95
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) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |