Patent US3473347A successfully refreshed from Google Patents.
US3473347A
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Refrigeration system employing bellows solution pump
Assignee: Metal Bellows Corp
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Filing: 1968-08-01
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Granted: 1969-10-21
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Expires: 1988-08-01
Abstract
No abstract record available.
Inventors
- 👤 Arthur J Andrews
- 👤 Stephen J Zierak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:47
CPC Classifications
F; F04; F04B; F04B45/00; F04B45/02; F04B39/00; F04B39/0005; F04B39/0022; F25; F25B; F25B15/00; F25B15/02; F25B15/025; 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) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |