Patent US3575756A successfully refreshed from Google Patents.
US3575756A
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Laminated structural members
Assignee: Boeing North American Inc
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Filing: 1968-10-15
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Granted: 1971-04-20
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Expires: 1988-10-15
Abstract
Abstract APPARATUS AND METHODS ARE DISCLOSED FOR VACUUM-BAG MANUFACTURE OF THERMOSETTING RESIN-IMPREGNATED FABRIC LAYERS INTO FORMS SUITABLE FOR STRUCTURAL MEMBER APPLICATIONS.
Inventors
- 👤 Louis Maus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:17
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/28; B29C70/40; B29C70/42; B29C70/44; B29C43/00; B29C43/32; B29C43/36; B29C43/3642; B29C2043/3644; B29C43/02; B29C43/10; B29C43/12; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |