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US2468484A
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Adjustable metal prop
Assignee: Acrow Engineers Ltd
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Filing: 1947-02-26
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Granted: 1949-04-26
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Expires: 1967-02-26
Abstract
No abstract record available.
Inventors
- 👤 Clark John Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:38
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/30; E; E04; E04G; E04G25/00; E04G25/04; E04G25/06; E04G25/061; E04G25/063; E04G25/065; E21; E21D; E21D15/00; E21D15/14; E21D15/16; E21D15/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-04-25 | 1952-10-25 | 1953-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-25 | 1956-10-25 | 1957-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-25 | 1960-10-25 | 1961-04-26 | $7700.00 | Window Closed / Lapsed |