Patent US2847193A successfully refreshed from Google Patents.
US2847193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Individual
•
Filing: 1954-08-30
•
Granted: 1958-08-12
•
Expires: 1974-08-30
Abstract
No abstract record available.
Inventors
- 👤 Richard H Carter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:19
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/02; F28D7/022; Y; Y10; Y10S; Y10S165/00; Y10S165/001; Y10S165/006
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB191006285A
Cited
US1005442A
Cited
US1854619A
Cited
US2057804A
Cited
US2047757A
Cited
US2578550A
Cited
US2707098A
Cited
US2730337A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |