US2533407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating and cooling system
Assignee: PUNCH ENGINEERING PTY Ltd
•
Filing: 1946-11-09
•
Granted: 1950-12-12
•
Expires: 1966-11-09
Abstract
No abstract record available.
Inventors
- 👤 Skillman Thomas Samuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:26
CPC Classifications
F; F24; F24F; F24F5/00; F24F5/0089; Y; Y10; Y10S; Y10S165/00; Y10S165/092; Y10S165/101; Y10S165/102; Y10S62/00; Y10S62/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2392553A
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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) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |