Patent US3215989A successfully refreshed from Google Patents.
Patent US1021537A successfully refreshed from Google Patents.
US1021537A
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Automatic drain-cock.
Assignee: LOUIS D LAWNIN
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Filing: 1911-03-20
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Granted: 1912-03-26
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Expires: 1931-03-20
Abstract
No abstract record available.
Inventors
- 👤 Albert W Lawnin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:46
CPC Classifications
E; E03; E03B; E03B9/00; E03B9/02; E03B9/14; E03B9/025; E03B9/027; E03B9/16; E03C; E03C1/00; E03C1/02; E03C1/10; F; F16; F16K; F16K15/00; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544; Y10T137/2557; Y10T137/5327; Y10T137/5497
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) | 1915-03-26 | 1915-09-25 | 1916-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1919-03-26 | 1919-09-25 | 1920-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1923-03-26 | 1923-09-25 | 1924-03-26 | $7700.00 | Window Closed / Lapsed |