US2849977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mold for forming multicurved sheet metal tank sections
Assignee: Goodyear Aircraft Corp
•
Filing: 1955-03-11
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Granted: 1958-09-02
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Expires: 1975-03-11
Abstract
No abstract record available.
Inventors
- 👤 James S Nielsen
- 👤 Jr Robert A Shannon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:13
CPC Classifications
B; B21; B21D; B21D22/00; B21D22/10; B21D22/12; B21D22/125
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR1056298A
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FR353684A
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US971583A
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US2016569A
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US2696184A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |