US2854827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cooling systems utilizing cooled circulated water
Assignee: LOCKERBIE
•
Filing: 1953-11-30
•
Granted: 1958-10-07
•
Expires: 1973-11-30
Abstract
No abstract record available.
Inventors
- 👤 Thomas E Lockerbie
- 👤 De Forest G Perryman
- 👤 Dunckel John Frederic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:34
CPC Classifications
F; F25; F25D; F25D31/00; F25D31/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1046252A
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US1214637A
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US1435643A
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US1438902A
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US1985043A
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US2133521A
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US2077871A
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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) | 1961-10-06 | 1962-04-07 | 1962-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-06 | 1966-04-07 | 1966-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-06 | 1970-04-07 | 1970-10-07 | $7700.00 | Window Closed / Lapsed |