US1235928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for washing and utilizing waste boiler-gases.
Assignee: Babcock and Wilcox Co
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Filing: 1916-04-24
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Granted: 1917-08-07
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Expires: 1936-04-24
Abstract
No abstract record available.
Inventors
- 👤 Frederick Sargent
- 👤 Herman C Heaton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:38
CPC Classifications
F; F22; F22D; F22D1/00; F22D1/42; Y; Y10; Y10S; Y10S122/00; Y10S122/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1920-08-06 | 1921-02-05 | 1921-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-08-06 | 1925-02-05 | 1925-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-08-06 | 1929-02-05 | 1929-08-07 | $7700.00 | Window Closed / Lapsed |