US2797645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conveyor pumps for viscid masses
Assignee: Skanska AB
•
Filing: 1954-05-13
•
Granted: 1957-07-02
•
Expires: 1974-05-13
Abstract
No abstract record available.
Inventors
- 👤 Kastner Otto Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:08
CPC Classifications
F; F04; F04B; F04B15/00; F04B15/02; Y; Y10; Y10S; Y10S417/00; Y10S417/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US333468A
Cited
US632950A
Cited
US1906765A
Cited
US1964932A
Cited
US1966819A
Cited
US2393096A
Cited
US2644401A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-01 | 1960-12-31 | 1961-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-01 | 1964-12-31 | 1965-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-01 | 1968-12-31 | 1969-07-02 | $7700.00 | Window Closed / Lapsed |