US970561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the interchange of heat.
Assignee: ANONIMA PER FRIGORIGENI E MOTORI "MOTOFRIGOR" Soc
•
Filing: 1908-03-20
•
Granted: 1910-09-20
•
Expires: 1928-03-20
Abstract
No abstract record available.
Inventors
- 👤 Gino Scaramuzza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:30
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/0219
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) | 1913-09-19 | 1914-03-21 | 1914-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1917-09-19 | 1918-03-21 | 1918-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1921-09-19 | 1922-03-21 | 1922-09-20 | $7700.00 | Window Closed / Lapsed |