US2492037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for generating foam
Assignee: Rockwood Sprinkler Co
•
Filing: 1945-05-08
•
Granted: 1949-12-20
•
Expires: 1965-05-08
Abstract
No abstract record available.
Inventors
- 👤 Howard G Freeman
- 👤 Hencinski Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:07
CPC Classifications
B; B05; B05B; B05B7/00; B05B7/0018; B05B7/005; B05B7/0056; B05B7/0062; B01; B01F; B01F25/00; B01F25/30; B01F25/31; B01F25/311; B01F25/3111; B01F25/31112; B05B7/0068; Y; Y10; Y10S; Y10S261/00; Y10S261/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US494604A
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DE140997C
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US1594621A
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US2210846A
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US2375833A
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US2247311A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-19 | 1953-06-20 | 1953-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-19 | 1957-06-20 | 1957-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-19 | 1961-06-20 | 1961-12-20 | $7700.00 | Window Closed / Lapsed |