US3533153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fabricating sandwich-type structures
Assignee: Boeing North American Inc
•
Filing: 1967-08-24
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Granted: 1970-10-13
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Expires: 1987-08-24
Abstract
No abstract record available.
Inventors
- 👤 Joseph Melill
- 👤 Harold J Greenspan
- 👤 Thomas E Dewitt
- 👤 Carl J Muser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:16
CPC Classifications
B; B21; B21D; B21D47/00; B23; B23K; B23K20/00; B23K20/18; E; E04; E04C; E04C2/00; E04C2/30; E04C2/34; E04C2/36; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4981
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2851770A
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US3044160A
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US3110961A
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US3105285A
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US3060561A
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US3168782A
Cited
US3345735A
Cited
US3365787A
Cited
US3419951A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-12 | 1974-04-13 | 1974-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-12 | 1978-04-13 | 1978-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-12 | 1982-04-13 | 1982-10-13 | $7700.00 | Window Closed / Lapsed |