Patent US2471584A successfully refreshed from Google Patents.
US2471584A
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Assignee: Individual
•
Filing: 1947-10-28
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Granted: 1949-05-31
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Expires: 1967-10-28
Abstract
No abstract record available.
Inventors
- 👤 Richards Ronald Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:38
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/38; F; F16; F16B; F16B2/00; F16B2/20; F16B2/22; F16B2/24; F16L; F16L3/00; F16L3/02; F16L3/04
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) | 1952-05-30 | 1952-11-29 | 1953-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-30 | 1956-11-29 | 1957-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-30 | 1960-11-29 | 1961-05-31 | $7700.00 | Window Closed / Lapsed |