Patent US3526740A successfully refreshed from Google Patents.
US3526740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for supplying gas mixtures to welding and cutting apparatus
Assignee: Messer Griesheim GmbH
•
Filing: 1969-02-10
•
Granted: 1970-09-01
•
Expires: 1989-02-10
Abstract
No abstract record available.
Inventors
- 👤 Georg Brinkmann
- 👤 Heinrich Schrader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:41
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/38; B23K35/383; B23K9/00; B23K9/16; B23K9/164; B23K9/173
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1746209A
Cited
US1855898A
Cited
US1935593A
Cited
US1963729A
Cited
US3143631A
Cited
US2824948A
Cited
US2768278A
Cited
US2852659A
Cited
US2908800A
Cited
US2870320A
Cited
US3253113A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-31 | 1974-03-02 | 1974-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-31 | 1978-03-02 | 1978-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-31 | 1982-03-02 | 1982-09-01 | $7700.00 | Window Closed / Lapsed |