Patent US2956419A successfully refreshed from Google Patents.
US2956419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure stabilizer system
Assignee: Dunham Bush Inc
•
Filing: 1955-11-23
•
Granted: 1960-10-18
•
Expires: 1975-11-23
Abstract
No abstract record available.
Inventors
- 👤 Boling Cecil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:39
CPC Classifications
F; F25; F25B; F25B49/00; F25B49/02; F25B49/027; F25B40/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |