Patent US2570818A successfully refreshed from Google Patents.
US2570818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tank filler pipe and closure
Assignee: Boeing Co
•
Filing: 1946-03-05
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Granted: 1951-10-09
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Expires: 1966-03-05
Abstract
No abstract record available.
Inventors
- 👤 John F Kirkbride
- 👤 Philip C Whitener
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:53
CPC Classifications
B; B64; B64D; B64D37/00; B64D37/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1369754A
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US1586273A
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US1756976A
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US1784198A
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US2089251A
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US2316507A
Cited
US2351526A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-08 | 1955-04-09 | 1955-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-08 | 1959-04-09 | 1959-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-08 | 1963-04-09 | 1963-10-09 | $7700.00 | Window Closed / Lapsed |