US3063682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchange unit
Assignee: American Air Filter Co Inc
•
Filing: 1960-08-15
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Granted: 1962-11-13
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Expires: 1980-08-15
Abstract
No abstract record available.
Inventors
- 👤 Earnest J Greene
- 👤 William V Millman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:12
CPC Classifications
F; F28; F28D; F28D1/00; F28D1/02; F28D1/04; F28D1/047; F28D1/0477
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) | 1965-11-12 | 1966-05-14 | 1966-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-12 | 1970-05-14 | 1970-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-12 | 1974-05-14 | 1974-11-13 | $7700.00 | Window Closed / Lapsed |