Patent US2723723A successfully refreshed from Google Patents.
US2723723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined muffler and spark arrester
Assignee: Individual
•
Filing: 1952-06-23
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Granted: 1955-11-15
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Expires: 1972-06-23
Abstract
No abstract record available.
Inventors
- 👤 Halliday John
- 👤 George G Cole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:20
CPC Classifications
F; F01; F01N; F01N1/00; F01N1/08; F01N1/083; F01N3/00; F01N3/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1144306A
Cited
US1804070A
Cited
US1975483A
Cited
US2047378A
Cited
US2312242A
Cited
US2557687A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-14 | 1959-05-16 | 1959-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-14 | 1963-05-16 | 1963-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-14 | 1967-05-16 | 1967-11-15 | $7700.00 | Window Closed / Lapsed |