US2331880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bolt cooling apparatus
Assignee: Westinghouse Electric Corp
•
Filing: 1941-10-23
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Granted: 1943-10-19
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Expires: 1961-10-23
Abstract
No abstract record available.
Inventors
- 👤 Eric A Zetterquist
- 👤 Boyd John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:52
CPC Classifications
B; B23; B23P; B23P19/00; B23P19/04; B23P19/06; B23P19/067; B23P19/068; F; F01; F01D; F01D25/00; F01D25/24; F01D25/243; F16; F16L; F16L23/00; F16L23/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-10-18 | 1947-04-19 | 1947-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-10-18 | 1951-04-19 | 1951-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-10-18 | 1955-04-19 | 1955-10-19 | $7700.00 | Window Closed / Lapsed |