Patent US2786007A successfully refreshed from Google Patents.
US2786007A
Expired / Lapsed
US
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Method of making one-piece hollow boot-lasts
Assignee: Marbill Co
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Filing: 1954-07-16
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Granted: 1957-03-19
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Expires: 1974-07-16
Abstract
No abstract record available.
Inventors
- 👤 Wilson W Chew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:06
CPC Classifications
A; A43; A43D; A43D3/00; A43D3/02; Y; Y10; Y10S; Y10S264/00; Y10S264/53; Y10S425/00; Y10S425/012; Y10S425/029; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028; Y10T156/103
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
THAT METHOD OF MAKING A ONE-PIECE HOLLOW LAST FOR USE IN FOOTWEAR MANUFACTURE WHICH COMPRISES AS STEPS PROVIDING A CAST OF THE LAST TO BE MADE, THE CAST BEING OF A MATERIAL WHICH IS NORMALLY RIGID AND SHAPERETAINING AT NORMAL TEMPERATURES BUT WHICH FUSES AT A TEMPERATURE BELOW 360* F., COATING THE BOTTOM AND SIDES AT LEAST OF THE CAST WITH A POLYESTER RESIN IN SEMI-LIQUID CONDITION THE COATING BEING APPKIED BY DIPPING THE CAST IN A BODY OF THE SEMI-LIQUID RESIN, ALLOWING THE COATING PARTIALLY TO GEL, EMBEDDING FIBER GLASS IN THE COATING CURING THE COATING AT A TEMPERATURE BELOW THAT WHICH WOULD FUSE THE CAST, AND THEN HEATING THE ASSEMBLY SUFFICIENTLY TO FUSE THE CAST AND WITHDRAWING THE FUSED MATERIAL WHICH FORMED THE CAST FROM THE INTERIOR OF THE CURED COATING THEREBY PROVIDING THE DESIRED HOLLOW LAST.
Claim 2
Dependent Claim
139 words
THAT METHOD OF MAKING A ONE-PIECE HOLLOW LAST FOR USE IN FOOTWEAR MANUFACTURE WHICH COMPRISES AS STEPS PROVIDING A CAST OF THE LAST TO BE MADE, THE CAST BEING OF A MATERIAL WHICH IS NORMALLY RIGID AND SHAPERETAINING AT NORMAL TEMPERATURES BUT WHICH FUSES AT A TEMPERATURE BELOW 360* F., COATING THE BOTTOM AND SIDES AT LEAST OF THE CAST WITH A POLYESTER RESIN IN SEMI-LIQUID CONDITION THE COATING BEING APPKIED BY DIPPING THE CAST IN A BODY OF THE SEMI-LIQUID RESIN, ALLOWING THE COATING PARTIALLY TO GEL, EMBEDDING FIBER GLASS IN THE COATING CURING THE COATING AT A TEMPERATURE BELOW THAT WHICH WOULD FUSE THE CAST, AND THEN HEATING THE ASSEMBLY SUFFICIENTLY TO FUSE THE CAST AND WITHDRAWING THE FUSED MATERIAL WHICH FORMED THE CAST FROM THE INTERIOR OF THE CURED COATING THEREBY PROVIDING THE DESIRED HOLLOW LAST.
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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) | 1960-03-18 | 1960-09-17 | 1961-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-18 | 1964-09-17 | 1965-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-18 | 1968-09-17 | 1969-03-19 | $7700.00 | Window Closed / Lapsed |