Patent US1218154A successfully refreshed from Google Patents.
US1218154A
Expired / Lapsed
US
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Method of testing filter-bodies.
Assignee: ZAHM MANUFACTURING Co
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Filing: 1917-01-26
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Granted: 1917-03-06
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Expires: 1937-01-26
Abstract
No abstract record available.
Inventors
- 👤 Edward Zahm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:12
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/08; G01N15/082; G01N15/0826; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/929; Y10S411/941
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) | 1920-03-05 | 1920-09-04 | 1921-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-03-05 | 1924-09-04 | 1925-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-03-05 | 1928-09-04 | 1929-03-06 | $7700.00 | Window Closed / Lapsed |