US3415315A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: LONG MANUFACTURING Ltd A CORP OF CANADA
•
Filing: 1966-06-29
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Granted: 1968-12-10
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Expires: 1986-06-29
Abstract
No abstract record available.
Inventors
- 👤 Desmond M Donaldson
- 👤 Peter M Comer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:49
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/0219; F28F9/0224; F28F9/0226; F28F9/001; F28F9/0202; F28F9/0204; F28F9/0214; F28F9/0217; Y; Y10; Y10S; Y10S165/00; Y10S165/454; Y10S165/471; Y10S165/473; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378; Y10T29/4938
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1333368A
Cited
US1450650A
Cited
GB358179A
Cited
US2240537A
Cited
US2504634A
Cited
GB1004604A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-10 | 1972-06-10 | 1972-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-10 | 1976-06-10 | 1976-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-10 | 1980-06-10 | 1980-12-10 | $7700.00 | Window Closed / Lapsed |