Patent US2978226A successfully refreshed from Google Patents.
US2978226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube type heat exchanger
Assignee: General Electric Co
•
Filing: 1958-12-18
•
Granted: 1961-04-04
•
Expires: 1978-12-18
Abstract
No abstract record available.
Inventors
- 👤 Vernon R White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:42
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/22; F28D; F28D7/00; F28D7/16; F28D7/163; F28D7/1638; F28D7/1646; Y; Y10; Y10S; Y10S165/00; Y10S165/051; Y10S165/052; Y10S165/053; Y10S165/054; Y10S165/055; Y10S165/056
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1691012A
Cited
US1790151A
Cited
US1794336A
Cited
US2391244A
Cited
US2549093A
Cited
US2499901A
Cited
US2655347A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |