US2983806A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling systems for electrical apparatus
Assignee: BOC Group Ltd
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Filing: 1958-12-31
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Granted: 1961-05-09
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Expires: 1978-12-31
Abstract
No abstract record available.
Inventors
- 👤 Fawkes John Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:24
CPC Classifications
H; H02; H02H; H02H5/00; H02H5/08; H02H5/086; B; B23; B23K; B23K9/00; B23K9/24; B23K9/28; B23K9/285
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) | 1964-05-08 | 1964-11-07 | 1965-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-08 | 1968-11-07 | 1969-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-08 | 1972-11-07 | 1973-05-09 | $7700.00 | Window Closed / Lapsed |