Patent US2821311A successfully refreshed from Google Patents.
US2821311A
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Assignee: HILLIARD T HICKS
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Filing: 1956-04-30
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Granted: 1958-01-28
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Expires: 1976-04-30
Abstract
No abstract record available.
Inventors
- 👤 Gaynor L Screws
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:05
CPC Classifications
B; B60; B60P; B60P3/00; B60P3/40; B60P3/41; B66; B66C; B66C23/00; B66C23/18; B66C23/36; B66C2700/00; B66C2700/03; B66C2700/0321; B66C2700/0357; B66C2700/0364
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US719012A
Cited
US2301555A
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US2487305A
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US2519119A
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US2670086A
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US2746629A
Cited
US2725990A
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US2772795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |