US2462136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger and method of making same
Assignee: Individual
•
Filing: 1945-05-24
•
Granted: 1949-02-22
•
Expires: 1965-05-24
Abstract
No abstract record available.
Inventors
- 👤 Samuel H Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:12
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/02; B21D53/04; Y; Y10; Y10S; Y10S165/00; Y10S165/454; Y10S165/471; Y10S165/49; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49366
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US748669A
Cited
US992673A
Cited
US1208022A
Cited
US1703682A
Cited
US1747115A
Cited
GB274906A
Cited
US1821702A
Cited
US1704409A
Cited
US1804191A
Cited
US1892607A
Cited
DE703758C
Cited
US2366224A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-22 | 1952-08-23 | 1953-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-22 | 1956-08-23 | 1957-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-22 | 1960-08-23 | 1961-02-22 | $7700.00 | Window Closed / Lapsed |