Patent US2825413A successfully refreshed from Google Patents.
US2825413A
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US
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Foam generating apparatus
Assignee: A F P ENGINEERING Ltd
•
Filing: 1955-09-19
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Granted: 1958-03-04
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Expires: 1975-09-19
Abstract
No abstract record available.
Inventors
- 👤 Williams Harold Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:03
CPC Classifications
B; B01; B01F; B01F25/00; B01F25/10; B01F25/104; B01F25/1041; B01F35/00; B01F35/75; B01F35/753; Y; Y10; Y10S; Y10S261/00; Y10S261/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US214090A
Cited
US515528A
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US1017585A
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US1874209A
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US2003184A
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US2138133A
Cited
DE917765C
Cited
GB491838A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |