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Patent US3481393A successfully refreshed from Google Patents.
US3481393A
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Modular cooling system
Assignee: International Business Machines Corp
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Filing: 1968-01-15
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Granted: 1969-12-02
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Expires: 1988-01-15
Abstract
No abstract record available.
Inventors
- 👤 Richard C Chu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:02
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/40; H10W40/47; F; F28; F28F; F28F3/00; F28F3/12; F28F9/00; F28F9/26; H10W90/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2179293A
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US2692961A
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US2717319A
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GB796763A
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US2942165A
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US3004196A
Cited
US3275921A
Cited
US3334684A
Cited
US3400543A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-01 | 1973-06-02 | 1973-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-01 | 1977-06-02 | 1977-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-01 | 1981-06-02 | 1981-12-02 | $7700.00 | Window Closed / Lapsed |