US1571068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat interchanger
Assignee: STANCLIFFE ENGINEERING Corp
•
Filing: 1922-08-07
•
Granted: 1926-01-26
•
Expires: 1942-08-07
Abstract
No abstract record available.
Inventors
- 👤 Cecil W Stancliffe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:33
CPC Classifications
F; F28; F28F; F28F7/00; F28F7/02; F28D; F28D7/00; F28D7/0008; F28D7/0025; F28F9/00; F28F9/26; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/395; Y10S165/397
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1929-01-25 | 1929-07-27 | 1930-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-01-25 | 1933-07-27 | 1934-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-01-25 | 1937-07-27 | 1938-01-26 | $7700.00 | Window Closed / Lapsed |