Patent US2564215A successfully refreshed from Google Patents.
US2564215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating and cooling system for buildings
Assignee: Individual
•
Filing: 1950-04-03
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Granted: 1951-08-14
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Expires: 1970-04-03
Abstract
No abstract record available.
Inventors
- 👤 Slane John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:37
CPC Classifications
F; F24; F24F; F24F5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US706451A
Cited
US1297633A
Cited
US2032080A
Cited
US2188566A
Cited
US2210960A
Cited
US2432354A
Cited
US2427780A
Cited
US2497947A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |