US2522883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum exhaust tube for connection to marine engines
Assignee: Individual
•
Filing: 1946-07-26
•
Granted: 1950-09-19
•
Expires: 1966-07-26
Abstract
No abstract record available.
Inventors
- 👤 Robert X Macarthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:47
CPC Classifications
B; B63; B63G; B63G13/00; B63G13/02; Y; Y02; Y02T; Y02T70/00; Y02T70/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US164477A
Cited
US1304961A
Cited
DE369209C
Cited
DE650590C
Cited
US714077A
Cited
US818951A
Cited
FR431795A
Cited
US1054301A
Cited
US1743508A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-18 | 1954-03-20 | 1954-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-18 | 1958-03-20 | 1958-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-18 | 1962-03-20 | 1962-09-19 | $7700.00 | Window Closed / Lapsed |