Patent US3529693A successfully refreshed from Google Patents.
US3529693A
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Acoustical sandwich panel having honeycomb core with crushed intermediate zone and method of making same
Assignee: Rohr Inc
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Filing: 1969-11-03
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Granted: 1970-09-22
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Expires: 1989-11-03
Abstract
No abstract record available.
Inventors
- 👤 James R Woodward
- 👤 Billy G Cook
- 👤 Wallie P Gray
- 👤 Edwin C Kamps
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:27
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/84; E04B1/86; B; B21; B21D; B21D47/00; E04C; E04C2/00; E04C2/30; E04C2/34; E04C2/36; E04C2/365; E04B2001/742; E04B2001/748; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1925453A
Cited
US2720948A
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US2728479A
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US2860740A
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US3386877A
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US3368314A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-21 | 1974-03-23 | 1974-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-21 | 1978-03-23 | 1978-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-21 | 1982-03-23 | 1982-09-22 | $7700.00 | Window Closed / Lapsed |