Patent US2923227A successfully refreshed from Google Patents.
US2923227A
Expired / Lapsed
US
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Fumes control system
Assignee: Individual
•
Filing: 1957-12-16
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Granted: 1960-02-02
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Expires: 1977-12-16
Abstract
No abstract record available.
Inventors
- 👤 Harry C Hawley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:12
CPC Classifications
B; B66; B66C; B66C17/00; B66C17/06; B66C17/10; B08; B08B; B08B15/00; B08B15/002; B08B15/005; B22; B22D; B22D45/00; B22D45/005; F; F16; F16L; F16L41/00; F16L41/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE462135C
Cited
GB190519838A
Cited
US2496209A
Cited
US2495376A
Cited
US2693749A
Cited
US2810336A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |