US3178022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bi-directional filter dryer for reverse cycle heat pumps
Assignee: Parker Hannifin Corp
•
Filing: 1962-01-22
•
Granted: 1965-04-13
•
Expires: 1982-01-22
Abstract
No abstract record available.
Inventors
- 👤 Balogh Stephen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:59
CPC Classifications
F; F25; F25B; F25B43/00; F25B43/003; B; B01; B01D; B01D35/00; B01D35/14; B01D35/15; F25B13/00; Y; Y10; Y10S; Y10S210/00; Y10S210/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US511757A
Cited
CA603135A
Cited
US2139659A
Cited
US2134413A
Cited
US2199258A
Cited
US2580764A
Cited
US2702993A
Cited
US2686596A
Cited
US2797704A
Cited
US3098819A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |