US3464227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansion valve and heat pump system
Assignee: Eaton Corp
•
Filing: 1968-07-22
•
Granted: 1969-09-02
•
Expires: 1988-07-22
Abstract
No abstract record available.
Inventors
- 👤 Alan A Matthies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:18
CPC Classifications
F; F25; F25B; F25B13/00; F25B41/00; F25B41/30; F25B41/31; F25B41/33; F25B41/34; F25B41/355; Y; Y02; Y02B; Y02B30/00; Y02B30/70
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-01 | 1973-03-03 | 1973-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-01 | 1977-03-03 | 1977-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-01 | 1981-03-03 | 1981-09-02 | $7700.00 | Window Closed / Lapsed |