US2825955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pumping of concrete
Assignee: National Research Development Corp UK
•
Filing: 1955-01-17
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Granted: 1958-03-11
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Expires: 1975-01-17
Abstract
No abstract record available.
Inventors
- 👤 Ede Ainsley Neville
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:30
CPC Classifications
F; F04; F04B; F04B15/00; F04B15/02; Y; Y10; Y10S; Y10S417/00; Y10S417/90; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87249
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US462313A
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US616401A
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US1309878A
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US654213A
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US1288496A
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US2378539A
Cited
US2356829A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-10 | 1961-09-09 | 1962-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-10 | 1965-09-09 | 1966-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-10 | 1969-09-09 | 1970-03-11 | $7700.00 | Window Closed / Lapsed |