Patent FR39690E successfully refreshed from Google Patents.
US2154136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid circulation system
Assignee: Carrier Corp
•
Filing: 1936-03-31
•
Granted: 1939-04-11
•
Expires: 1956-03-31
Abstract
No abstract record available.
Inventors
- 👤 Michael P Parcaro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:30
CPC Classifications
F; F25; F25B; F25B49/00; F25B49/02; F25B49/022; F25B2341/00; F25B2341/06; F25B2341/068; F25B2341/0682; F25B2400/00; F25B2400/07; F25B2400/074; F25B2400/075
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1942-04-10 | 1942-10-10 | 1943-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-04-10 | 1946-10-10 | 1947-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-04-10 | 1950-10-10 | 1951-04-11 | $7700.00 | Window Closed / Lapsed |