US3523858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilated honeycomb structure
Assignee: Hexcel Products Inc
•
Filing: 1964-05-21
•
Granted: 1970-08-11
•
Expires: 1984-05-21
Abstract
No abstract record available.
Inventors
- 👤 Conrad R Schudel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:12
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/10; B32B3/12; E; E04; E04C; E04C2/00; E04C2/30; E04C2/34; E04C2/36; E04C2/365; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB157430A
Cited
US1996490A
Cited
US2501180A
Cited
US2836863A
Cited
US2860740A
Cited
US3070480A
Cited
US3104194A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-10 | 1974-02-09 | 1974-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-10 | 1978-02-09 | 1978-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-10 | 1982-02-09 | 1982-08-11 | $7700.00 | Window Closed / Lapsed |