US1625152A
Untitled record
Abstract
This record has no abstract on file.
Term
Term ended
Expired 19 April 1944, 82.4 years ago.
- Granted
- Expired
- Today
Every citation, both ways
| Document | Relation | Office | Cited during |
|---|---|---|---|
| US4953904A | Cited by | United States of America | Search report |
| US4776584A | Cited by | United States of America | Search report |
Numbers
- Application
- 1625152
Classification
- CPC, 2
- E21B17/006
- A47G21/001