Patent US3687768A successfully refreshed from Google Patents.
US3687768A
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Method of making a laminated boat hull
Assignee: WILLIAM VAN ALAN CLARK JR
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Filing: 1968-12-18
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Granted: 1972-08-29
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Expires: 1988-12-18
Abstract
Abstract A METHOD OF MOLDING A COMPOUNDLY-CURVED BOAT HULL ON A MOLD SURFACE COMPRISING THE STEPS OF LAYING UP ON THE MOLD A FIRST SKIN; PLACING UPON THE FIRST SKIN A FIRST SET OF SUBSTANTIALLY PARALLEL SPACED ELONGATED MEMBERS; LAYING A CONTINOUS MEMBRANE ADHERING TO THE EXPOSED PORTIONS OF THE FIRST SKIN; PLACING A SECOND SET OF SUBSTANTIALLY PARALLEL SPACED ELONGATED MEMBERS UPON THE CONTINUOUS MEMBRANE SO AS TO SUBSTANTIALLY FILL THE INTERSTITIAL VALLEYS BETWEEN THE MEMBERS OF THE FIRST SET; AND LAYING UP A SECOND SKIN UPON THE SECOND SET OF ELONGATED MEMBERS AND UPON THE EXPOSED PORTIONS OF THE CONTINUOUS MEMBRANE TO COMPLETE THE HULL.
Inventors
- 👤 Allan Holmes Vaitses
- 👤 William Van Alan Clark Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:05
CPC Classifications
B; B29; B29D; B29D99/00; B29D99/001; B29D99/0021; B29C; B29C70/00; B29C70/04; B29C70/28; B29C70/30; B63; B63B; B63B5/00; B63B5/24; B29L; B29L2031/00; B29L2031/30; B29L2031/3067; B29L2031/307; Y; Y02; Y02T; Y02T70/00; Y02T70/10; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028; Y10T156/1089; Y10T156/1092; Y10T156/1093
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |