US2487669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Journal box seal
Assignee: Individual
•
Filing: 1946-12-16
•
Granted: 1949-11-08
•
Expires: 1966-12-16
Abstract
No abstract record available.
Inventors
- 👤 Milton D Pattullo
- 👤 Richard J Shanahan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:47
CPC Classifications
B; B61; B61F; B61F15/00; B61F15/20; B61F15/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1273738A
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US1989110A
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US2106293A
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US2012673A
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US2105871A
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US2159825A
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US2165102A
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US2183004A
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US2181203A
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US2213414A
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US2210823A
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US2241870A
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US2348586A
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GB558544A
Cited
US2405279A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-07 | 1953-05-09 | 1953-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-07 | 1957-05-09 | 1957-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-07 | 1961-05-09 | 1961-11-08 | $7700.00 | Window Closed / Lapsed |