US3407872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchange tank
Assignee: International Agri-Systems Inc
•
Filing: 1967-03-30
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Granted: 1968-10-29
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Expires: 1987-03-30
Abstract
No abstract record available.
Inventors
- 👤 Edward J Crane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:56
CPC Classifications
F; F25; F25D; F25D13/00; F25D13/06; F25D13/065; A; A23; A23B; A23B4/00; A23B4/06; A23B4/062; A23B4/07; F28; F28C; F28C3/00; F28C3/005; Y; Y10; Y10S; Y10S165/00; Y10S165/318
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) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |