US2979156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum degasifier
Assignee: Worthington Corp
•
Filing: 1959-05-01
•
Granted: 1961-04-11
•
Expires: 1979-05-01
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Sebald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:51
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/0042; B01D19/0047
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1138081A
Cited
DE341147C
Cited
US1758566A
Cited
US1508985A
Cited
US2068094A
Cited
US2353138A
Cited
US2677433A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |