US2844360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Sulzer AG
•
Filing: 1956-09-07
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Granted: 1958-07-22
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Expires: 1976-09-07
Abstract
No abstract record available.
Inventors
- 👤 Buri Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:21
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/06; F22; F22D; F22D1/00; F22D1/006; F22D1/02; F22G; F22G1/00; F22G1/005; F22G3/00; F22G3/009; F28F; F28F21/00; F28F21/08; F28F21/081; F28F21/082; F28F21/083; F28F9/00; F28F9/26; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/40; Y10S165/401; Y10S165/402
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) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |