US3205288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacture of hollow reinforced plastic articles
Assignee: Curtiss Wright Corp
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Filing: 1961-07-24
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Granted: 1965-09-07
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Expires: 1981-07-24
Abstract
No abstract record available.
Inventors
- 👤 William E Bates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:23
CPC Classifications
B; B29; B29D; B29D99/00; B29D99/0025; B29D99/0028; B29C; B29C33/00; B29C33/44; B29C33/54; B29C70/00; B29C70/04; B29C70/28; B29C70/30; B29C70/34; B29C70/40; B29C70/42; B29C70/44; B29C70/446; B29C70/46; B29C70/68; B29C70/86; B29C70/865; B29C2791/00; B29C2791/001; B29C43/00; B29C43/02; B29C43/10; B29C43/12; B29K; B29K2711/00; B29K2711/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
197 words
A METHOD OF MAKING A HOLLOW PROPELLER BLADE COMPRISING THE STEPS OF PROVIDING A PAIR OF COMPOSITE SHEETS EACH CONSISTING OF A LAYER FORMED OF RESIN IMPREGNATED REINFORCING GLASS CLOTH ON ONE SIDE OF A THICKER LAYER OF LESS DENSE MATERIAL, HEATING SAID COMPOSITE SHEETS, APPLYING RESIN IMPREGNATED GLASS CLOTH TO THE OTHER SIDE OF THE THICKER LAYER OF EACH OF THE COMPOSITE SHEETS BEFORE SUCH SHEETS HAVE COOLED SUBSTANTIALLY, PERFORMING THE RESULTING MULTILAYERED SHEETS ON OPPOSITE SIDES OF AN EXPANDABLE AND CONTRACTABLE MANDREL IN A MOLD TO SUBSTANTIALLY THE CONFIGURATION OF THE PROPELLER BLADE, CURING THE PERFORMED SHEETS UNDER HEAT AND PRESSURE IN THE MOLD, REMOVING THE PERFORMED SHEETS FROM THE MANDREL, APPLYING RESIN IMPREGNATED REINFORCING GLASS CLOTH TO THE OPPOSITE SIDES AND OVER EDGES OF THE MANDREL, REPLACING THE PERFORMED SHEETS ON THE MANDREL, APPLYING ADDITIONAL RESIN IMPREGNATED REINFORCING GLASS CLOTH TO THE OPPOSITE SIDES OF THE MANDREL AND OVER THE PERFORMED SHEET AS WELL AS OVER EDGES OF THE MANDREL, EXPANDING THE MANDREL IN A MOLD HAVING THE DESIRED CONTOUR FOR THE PROPELLER BLADE, CURING THE MOLDED FORM THEREIN UNDER HEAT AND PRESSURE, AND COLLAPSING AND REMOVING THE MANDREL FROM THE FORMED PROPELLER BLADE.
Claim 2
Independent Claim
197 words
A METHOD OF MAKING A HOLLOW PROPELLER BLADE COMPRISING THE STEPS OF PROVIDING A PAIR OF COMPOSITE SHEETS EACH CONSISTING OF A LAYER FORMED OF RESIN IMPREGNATED REINFORCING GLASS CLOTH ON ONE SIDE OF A THICKER LAYER OF LESS DENSE MATERIAL, HEATING SAID COMPOSITE SHEETS, APPLYING RESIN IMPREGNATED GLASS CLOTH TO THE OTHER SIDE OF THE THICKER LAYER OF EACH OF THE COMPOSITE SHEETS BEFORE SUCH SHEETS HAVE COOLED SUBSTANTIALLY, PERFORMING THE RESULTING MULTILAYERED SHEETS ON OPPOSITE SIDES OF AN EXPANDABLE AND CONTRACTABLE MANDREL IN A MOLD TO SUBSTANTIALLY THE CONFIGURATION OF THE PROPELLER BLADE, CURING THE PERFORMED SHEETS UNDER HEAT AND PRESSURE IN THE MOLD, REMOVING THE PERFORMED SHEETS FROM THE MANDREL, APPLYING RESIN IMPREGNATED REINFORCING GLASS CLOTH TO THE OPPOSITE SIDES AND OVER EDGES OF THE MANDREL, REPLACING THE PERFORMED SHEETS ON THE MANDREL, APPLYING ADDITIONAL RESIN IMPREGNATED REINFORCING GLASS CLOTH TO THE OPPOSITE SIDES OF THE MANDREL AND OVER THE PERFORMED SHEET AS WELL AS OVER EDGES OF THE MANDREL, EXPANDING THE MANDREL IN A MOLD HAVING THE DESIRED CONTOUR FOR THE PROPELLER BLADE, CURING THE MOLDED FORM THEREIN UNDER HEAT AND PRESSURE, AND COLLAPSING AND REMOVING THE MANDREL FROM THE FORMED PROPELLER BLADE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |