US2957487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic liquid feed apparatus
Assignee: ROY J ARMBRUST
•
Filing: 1956-02-06
•
Granted: 1960-10-25
•
Expires: 1976-02-06
Abstract
No abstract record available.
Inventors
- 👤 Clarence M Armbrust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:42
CPC Classifications
F; F22; F22D; F22D11/00; F22D11/02; F22D11/06; G; G05; G05D; G05D11/00; G05D11/006; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2499; Y10T137/2559; Y10T137/2564; Y10T137/7287; Y10T137/7339
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US216752A
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US547436A
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US931402A
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US1726083A
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US2183436A
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US2221349A
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US2471328A
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US2671464A
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US2685301A
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US2710016A
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US2806483A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |