US3220380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deposition chamber including heater element enveloped by a quartz workholder
Assignee: Merck and Co Inc
•
Filing: 1961-08-21
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Granted: 1965-11-30
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Expires: 1981-08-21
Abstract
No abstract record available.
Inventors
- 👤 Edward C Schaarschmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:08
CPC Classifications
C; C30; C30B; C30B25/00; C30B25/02; C30B25/12; C30B35/00; H; H05; H05B; H05B3/00; H05B3/62; Y; Y10; Y10S; Y10S118/00; Y10S118/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3001877A
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US2959504A
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US3089788A
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US3042493A
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US3131098A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |