Patent US3419251A successfully refreshed from Google Patents.
US3419251A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Distributor
Assignee: US STONEWARE Inc
•
Filing: 1966-10-19
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Granted: 1968-12-31
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Expires: 1986-10-19
Abstract
No abstract record available.
Inventors
- 👤 John S Eckert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:33
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/06; B01D3/00; B01D3/008; B01F; B01F35/00; B01F35/71; B01F35/717; B01F35/7182; B05; B05B; B05B1/00; B05B1/30; B05B1/3006; F; F28; F28F; F28F25/00; F28F25/02; F28F25/06; B01F25/00; B01F25/40; B01F25/41; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7834
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB356516A
Cited
US2019922A
Cited
US2253261A
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US2485849A
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US2470652A
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US2621032A
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US2530002A
Cited
US2755133A
Cited
GB764559A
Cited
US3143581A
Cited
US3199791A
Cited
US3263976A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |