Patent US2544485A successfully refreshed from Google Patents.
US2544485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chain structure
Assignee: Individual
•
Filing: 1946-09-14
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Granted: 1951-03-06
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Expires: 1966-09-14
Abstract
No abstract record available.
Inventors
- 👤 Luther A Blackburn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:39
CPC Classifications
F; F16; F16G; F16G15/00; F16G15/02; F16H; F16H19/00; F16H19/02; F16H19/06; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18152
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) | 1954-03-05 | 1954-09-04 | 1955-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-05 | 1958-09-04 | 1959-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-05 | 1962-09-04 | 1963-03-06 | $7700.00 | Window Closed / Lapsed |