Patent US2328812A successfully refreshed from Google Patents.
US2328812A
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Venting apparatus
Assignee: Lincoln Engineering Co
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Filing: 1942-03-16
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Granted: 1943-09-07
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Expires: 1962-03-16
Abstract
No abstract record available.
Inventors
- 👤 Victor G Klein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:34
CPC Classifications
F; F04; F04B; F04B49/00; F04B49/22; F04B49/24; F01; F01L; F01L25/00; F01L25/08; F04B23/00; F04B23/02; F04B49/02; F04B49/022; F04B9/00; F04B9/08; F04B9/12; F04B9/123; F16; F16N; F16N13/00; F16N13/02; F16N13/06; F16N13/16; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2617
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) | 1946-09-06 | 1947-03-08 | 1947-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-09-06 | 1951-03-08 | 1951-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-09-06 | 1955-03-08 | 1955-09-07 | $7700.00 | Window Closed / Lapsed |