Patent US1532730A successfully refreshed from Google Patents.
US1532730A
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Smoke and gas strainer and filter
Assignee: C AND O R CORP
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Filing: 1924-01-07
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Granted: 1925-04-07
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Expires: 1944-01-07
Abstract
No abstract record available.
Inventors
- 👤 Chalupa Emil
- 👤 Thomas F O'rourke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:07
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/02; F01N3/021; F01N3/0215; F01N13/00; F01N13/009; F01N13/0097; F01N3/0212; F01N2230/00; F01N2230/02; F01N2330/00; F01N2330/12; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S55/00; Y10S55/20; Y10S55/30
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) | 1928-04-06 | 1928-10-06 | 1929-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-04-06 | 1932-10-06 | 1933-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-04-06 | 1936-10-06 | 1937-04-07 | $7700.00 | Window Closed / Lapsed |