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Patent US2463662A successfully refreshed from Google Patents.
US2463662A
Expired / Lapsed
US
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Cover for the outlet ends of exhaust pipes of internal-combustion engines
Assignee: GAVIN HARDWICKE CHAPMAN
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Filing: 1947-08-01
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Granted: 1949-03-08
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Expires: 1967-08-01
Abstract
No abstract record available.
Inventors
- 👤 Wallace William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:43
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/08; F01N13/085; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7898; Y10T137/7902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-07 | 1952-09-06 | 1953-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-07 | 1956-09-06 | 1957-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-07 | 1960-09-06 | 1961-03-08 | $7700.00 | Window Closed / Lapsed |