US3519798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for thermal processing of semiconductor wafers
Assignee: Siemens AG
•
Filing: 1968-04-04
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Granted: 1970-07-07
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Expires: 1988-04-04
Abstract
No abstract record available.
Inventors
- 👤 Albert Walther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:46
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/44; C23C16/46; C30; C30B; C30B25/00; C30B25/02; C30B25/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1806512A
Cited
US1060265A
Cited
US2691717A
Cited
US2933586A
Cited
US3293074A
Cited
US3381114A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-06 | 1974-01-05 | 1974-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-06 | 1978-01-05 | 1978-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-06 | 1982-01-05 | 1982-07-07 | $7700.00 | Window Closed / Lapsed |