US2996595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and process for regulating current flow through material
Assignee: Merck and Co Inc
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Filing: 1959-03-31
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Granted: 1961-08-15
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Expires: 1979-03-31
Abstract
No abstract record available.
Inventors
- 👤 Kniazuk Michael
- 👤 Fred R Prediger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:26
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/04; C; C01; C01B; C01B33/00; C01B33/02; C01B33/021; C01B33/027; C01B33/035; C22; C22F; C22F1/00; C22F1/16; C23; C23C; C23C16/00; C23C16/22
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) | 1964-08-14 | 1965-02-13 | 1965-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-14 | 1969-02-13 | 1969-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-14 | 1973-02-13 | 1973-08-15 | $7700.00 | Window Closed / Lapsed |