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Patent US3498069A successfully refreshed from Google Patents.
US3498069A
Expired / Lapsed
US
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Method of extracting heat from articles with an ebullient liquid freezant
Assignee: EIDP Inc
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Filing: 1969-02-19
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Granted: 1970-03-03
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Expires: 1989-02-19
Abstract
No abstract record available.
Inventors
- 👤 Vincent H Waldin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:21
CPC Classifications
F; F25; F25D; F25D9/00; F25D9/005; A; A23; A23B; A23B2/00; A23B2/80; A23B2/803; A23B2/8033; A23B2/85; A23B2/88
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) | 1973-03-02 | 1973-09-01 | 1974-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-02 | 1977-09-01 | 1978-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-02 | 1981-09-01 | 1982-03-03 | $7700.00 | Window Closed / Lapsed |