US3375672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for heat exchange and cleansing of gases in periodically reversible regenerators
Assignee: Linde GmbH
•
Filing: 1964-08-14
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Granted: 1968-04-02
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Expires: 1984-08-14
Abstract
No abstract record available.
Inventors
- 👤 Jakob Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:40
CPC Classifications
F; F25; F25J; F25J5/00; B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; F25J2210/00; F25J2210/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1974065A
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US2107335A
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US2825212A
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US3091093A
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US3074245A
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US2981082A
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US3073128A
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US3105360A
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US3214925A
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US3216206A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-02 | 1971-10-02 | 1972-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-02 | 1975-10-02 | 1976-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-02 | 1979-10-02 | 1980-04-02 | $7700.00 | Window Closed / Lapsed |