US1522980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary-pump mechanism
Assignee: Layne and Bowler Co
•
Filing: 1923-05-08
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Granted: 1925-01-13
•
Expires: 1943-05-08
Abstract
No abstract record available.
Inventors
- 👤 Albert L Roco
- 👤 Mahlon E Layne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:49
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/04; F04D29/043; F04D29/044; Y; Y10; Y10S; Y10S415/00; Y10S415/901; Y10T; Y10T403/00; Y10T403/36
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) | 1928-01-13 | 1928-07-14 | 1929-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-01-13 | 1932-07-14 | 1933-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-01-13 | 1936-07-14 | 1937-01-13 | $7700.00 | Window Closed / Lapsed |