US3483824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary pump with check valve
Assignee: Babcock and Wilcox Co
•
Filing: 1967-09-15
•
Granted: 1969-12-16
•
Expires: 1987-09-15
Abstract
No abstract record available.
Inventors
- 👤 Theodore S Sprague
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:04
CPC Classifications
F; F04; F04D; F04D15/00; F04D15/0077; F04D15/0083; F04D3/00; F04D3/005; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7839
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US890117A
Cited
US1460428A
Cited
US1683949A
Cited
US2030560A
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US2459815A
Cited
US2947466A
Cited
US3160112A
Cited
US3118467A
Cited
US3263906A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-15 | 1973-06-16 | 1973-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-15 | 1977-06-16 | 1977-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-15 | 1981-06-16 | 1981-12-16 | $7700.00 | Window Closed / Lapsed |