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US3147546A
Expired / Lapsed
US
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Protected metal articles
Assignee: Bowman Steel Corp
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Filing: 1960-11-25
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Granted: 1964-09-08
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Expires: 1980-11-25
Abstract
No abstract record available.
Inventors
- 👤 Hamilton B Bowman
- 👤 James D Weinzettle
- 👤 Downing Merritt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:29
CPC Classifications
B; B32; B32B; B32B37/00; B32B37/14; B32B37/16; B32B37/20; B32B37/203; B32B37/206; B32B15/00; B32B15/04; B32B15/08; B32B38/00; E; E04; E04D; E04D3/00; E04D3/35; Y; Y10; Y10S; Y10S228/00; Y10S228/903; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1016; Y10T29/00; Y10T29/49; Y10T29/4981; Y10T29/49812
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
80 words
IN THE PREPARATION OF A CORRUGATED METAL CORE SHEET IN WHICH A LAYER OF ASBESTOS IS JOINED TO A METAL SHEET, A TOPCOAT IS APPLIED TO THE ASBESTOS AND THE RESULTING METAL CORE SHEET IS MECHANICALLY DEFORMED TO CORRUGATE IT, THE IMPROVEMENT COMPRISING APPLYING TO THE SURFACES OF SAID TOPCOATED ASBESTOS PRIOR TO SAID MECHANICAL DEFORMATION A THIN CONTINUOUS PLASTIC FILM, LIGHTLY PRESSING SAID THIN PLASTIC FILM TO SAID TOPCOAT AND THEN MECHANICALLY DEFORMING THE RESULTING ARTICLE TO CORRUGATE IT.
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) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |