Patent US2552728A successfully refreshed from Google Patents.
US2552728A
Expired / Lapsed
US
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Assignee: Individual
•
Filing: 1946-03-22
•
Granted: 1951-05-15
•
Expires: 1966-03-22
Abstract
No abstract record available.
Inventors
- 👤 Ernest G Liner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:28
CPC Classifications
A; A44; A44C; A44C5/00; A44C5/18; A44C5/20; A44C5/2052; Y; Y10; Y10S; Y10S24/00; Y10S24/30; Y10S24/51; Y10S24/52; Y10T; Y10T24/00; Y10T24/45; Y10T24/45005; Y10T24/45099; Y10T24/45225; Y10T24/45969
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US276965A
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CH202030A
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US2287308A
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US2455929A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |