Patent US3309894A successfully refreshed from Google Patents.
US3309894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for separating, removing, and storing non-condensable gas in absorption-type refrigerators
Assignee: HOWA SANGYO A KK
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Filing: 1966-01-28
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Granted: 1967-03-21
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Expires: 1986-01-28
Abstract
No abstract record available.
Inventors
- 👤 Tamada Kazumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:20
CPC Classifications
F; F25; F25B; F25B43/00; F25B43/04; F25B43/046; F25B15/00; Y; Y02; Y02A; Y02A30/00; Y02A30/27; Y02B; Y02B30/00; Y02B30/62
Claims Analysis
Total Claims: 0
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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) | 1970-03-20 | 1970-09-19 | 1971-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-20 | 1974-09-19 | 1975-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-20 | 1978-09-19 | 1979-03-21 | $7700.00 | Window Closed / Lapsed |