US3474513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fabricating a cored structure
Assignee: WILLIAM D ALLINGHAM
•
Filing: 1967-04-07
•
Granted: 1969-10-28
•
Expires: 1987-04-07
Abstract
No abstract record available.
Inventors
- 👤 William D Allingham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:39
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/10; F28D7/106; B; B21; B21D; B21D53/00; B21D53/02; B21D53/08; F28F; F28F1/00; F28F1/10; F28F1/105; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49361
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1512295A
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US2252209A
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US2406051A
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US2882588A
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US3021804A
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US3005036A
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US3237297A
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US3191418A
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US3310868A
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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) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |