US1234948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal pump.
Assignee: American Well Works
•
Filing: 1915-09-13
•
Granted: 1917-07-31
•
Expires: 1935-09-13
Abstract
No abstract record available.
Inventors
- 👤 John B Sperry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:07
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/05; F04D29/051; Y; Y10; Y10S; Y10S415/00; Y10S415/901
Claims Analysis
Total Claims: 0
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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) | 1920-07-30 | 1921-01-29 | 1921-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-07-30 | 1925-01-29 | 1925-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-07-30 | 1929-01-29 | 1929-07-31 | $7700.00 | Window Closed / Lapsed |