US2905447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubular heat-exchanger
Assignee: Individual
•
Filing: 1957-04-22
•
Granted: 1959-09-22
•
Expires: 1977-04-22
Abstract
No abstract record available.
Inventors
- 👤 Huet Andre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:29
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F1/42; F28F1/12; F28F1/14; F28F1/16; F28F1/422; F28F13/00; F28F13/06; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/442; Y10S165/452; Y10T; Y10T428/00; Y10T428/24; Y10T428/24744
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1962-09-21 | 1963-03-23 | 1963-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-21 | 1967-03-23 | 1967-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-21 | 1971-03-23 | 1971-09-22 | $7700.00 | Window Closed / Lapsed |