Patent US2856952A successfully refreshed from Google Patents.
US2856952A
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US
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Assignee: Individual
•
Filing: 1956-05-04
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Granted: 1958-10-21
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Expires: 1976-05-04
Abstract
No abstract record available.
Inventors
- 👤 Crawford K Stillwagon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:19
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/02; F16K27/0263; F16K11/00; F16K11/02; F16K11/04; F16K11/052; F16K11/0525; F16K27/0272; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/7036; Y10T137/7504; Y10T137/7668; Y10T137/8593; Y10T137/86493; Y10T137/86831; Y10T137/86863
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1827266A
Cited
US2728550A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |