Patent US2986894A successfully refreshed from Google Patents.
US2986894A
Expired / Lapsed
US
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Purge recovery arrangement for refrigeration systems
Assignee: Carrier Corp
•
Filing: 1958-02-03
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Granted: 1961-06-06
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Expires: 1978-02-03
Abstract
No abstract record available.
Inventors
- 👤 James W Endress
- 👤 Terry M Townsend
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:02
CPC Classifications
F; F25; F25B; F25B43/00; F25B43/04; F25B43/043
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1636512A
Cited
US1884312A
Cited
US2062697A
Cited
US2249622A
Cited
US2321964A
Cited
US2450707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |