US3512939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for use in conjunction with testing electrical apparatus containing a gaseous filling including sulfur hexafluoride
Assignee: BBC Brown Boveri AG Germany
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Filing: 1967-10-02
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Granted: 1970-05-19
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Expires: 1987-10-02
Abstract
No abstract record available.
Inventors
- 👤 Litty Hugi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:11
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/08; H01F27/20; H01B; H01B3/00; H01B3/02; H01B3/16; H01F27/40; H01F27/402; H01F27/404; H01H; H01H33/00; H01H33/02; H01H33/53; H01H33/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3311484A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-18 | 1973-11-17 | 1974-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-18 | 1977-11-17 | 1978-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-18 | 1981-11-17 | 1982-05-19 | $7700.00 | Window Closed / Lapsed |