US3473604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recuperative heat exchanger
Assignee: Daimler Benz AG
•
Filing: 1967-01-16
•
Granted: 1969-10-21
•
Expires: 1987-01-16
Abstract
No abstract record available.
Inventors
- 👤 Eberhard Tiefenbacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:31
CPC Classifications
G; G06; G06K; G06K13/00; G06K13/02; G06K13/06; G06K13/067; F; F28; F28D; F28D9/00; F28D9/0031; F28F; F28F1/00; F28F1/02; F28F1/06; F28F3/00; F28F3/08; F28F3/083; F28F3/10; F28F9/00; F28F9/02; F28F9/0219; F28F9/0221; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/356; Y10S165/387
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB189702543A
Cited
US1775103A
Cited
US1910486A
Cited
US2462421A
Cited
US2566928A
Cited
BE541415A
Cited
US2959401A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |