Patent US1842298A successfully refreshed from Google Patents.
US1842298A
Expired / Lapsed
US
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Underground pipe line
Assignee: AO Smith Corp
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Filing: 1929-02-11
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Granted: 1932-01-19
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Expires: 1949-02-11
Abstract
No abstract record available.
Inventors
- 👤 Smith Lloyd Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:32
CPC Classifications
F; F16; F16L; F16L58/00; F16L58/02; F16L58/04; F16L58/14; F16L13/00; F16L13/02; F16L13/0254; F16L13/0272; Y; Y10; Y10S; Y10S220/00; Y10S220/29; Y10T; Y10T29/00; Y10T29/49; Y10T29/49428
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) | 1935-01-18 | 1935-07-20 | 1936-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-01-18 | 1939-07-20 | 1940-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-01-18 | 1943-07-20 | 1944-01-19 | $7700.00 | Window Closed / Lapsed |