US2769302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for supplying combustion air to internal combustion engines
Assignee: William Doxford and Sons Ltd
•
Filing: 1952-01-22
•
Granted: 1956-11-06
•
Expires: 1972-01-22
Abstract
No abstract record available.
Inventors
- 👤 Purdie William Hamilton
- 👤 Jackson Percy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:29
CPC Classifications
F; F02; F02B; F02B37/00; F02B37/04; F02B37/10; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2036989A
Cited
GB288217A
Cited
FR684902A
Cited
CH160008A
Cited
GB513971A
Cited
GB537483A
Cited
US2608054A
Cited
GB620376A
Cited
US2503289A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |