Patent US3533894A successfully refreshed from Google Patents.
US3533894A
Expired / Lapsed
US
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Directionally stabilized honeycomb product
Assignee: Hexcel Corp
•
Filing: 1965-10-24
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Granted: 1970-10-13
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Expires: 1985-10-24
Abstract
No abstract record available.
Inventors
- 👤 Theodore W Engelbrecht
- 👤 Andrew C Marshall
- 👤 William L Emerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:48
CPC Classifications
B; B31; B31D; B31D3/00; B31D3/02; B32; B32B; B32B3/00; B32B3/10; B32B3/12; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/24165
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2171358A
Cited
US2860740A
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US2960197A
Cited
US3227429A
Cited
US3256001A
Cited
US3402105A
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 |