US2492298A
Gas heat exchanger
Abstract
This record has no abstract on file.
Term
Term ended
Expired 27 December 1966, 59.7 years ago.
- Priority
- Filed
- Granted
- Expired
- Today
Every citation, both ways
| Document | Relation | Office | Cited during |
|---|---|---|---|
| US4577681A | Cited by | United States of America | Search report |
| US9605913B2 | Cited by | United States of America | Search report |
| US2947152A | Cited by | United States of America | Search report |
| US4390352A | Cited by | United States of America | Search report |
| US2012298340A1 | Cited by | United States of America | Pre-grant |
| US3470949A | Cited by | United States of America | Search report |
| US1103440A | Cites | United States of America | Search report |
| DE179722C | Cites | Germany | Search report |
| US1912644A | Cites | United States of America | Search report |
| US1947606A | Cites | United States of America | Search report |
1 priority claim, no other members on record
Priority claims1
| Document | Office | Kind | Date |
|---|---|---|---|
| 2492298X | Sweden | A |
Numbers
- Application
- 683716
Titles
- English
- Gas heat exchanger
Classification
- CPC, 1
- F28F13/12
- IPC, 1
- F28F13 12