Patent US1978480A successfully refreshed from Google Patents.
US1978480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pumping mechanism
Assignee: Babcock and Wilcox Co
•
Filing: 1930-06-20
•
Granted: 1934-10-30
•
Expires: 1950-06-20
Abstract
No abstract record available.
Inventors
- 👤 Ernest J Svenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:31
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/08; F04C2/082; F04C2/088; F04B; F04B23/00; F04B23/04; F04B23/08; F04B23/10; F04B23/103; F04C11/00; F04C11/005
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1937-10-29 | 1938-04-30 | 1938-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-10-29 | 1942-04-30 | 1942-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-10-29 | 1946-04-30 | 1946-10-30 | $7700.00 | Window Closed / Lapsed |