Title: Roofing shingle utilizing an asphalt composition and method of making an asphalt-saturated base sheet

Abstract: A method of making a roofing shingle and an asphalt-saturated base sheet generally, utilizing a particular asphalt composition, are disclosed herein. The composition includes asphalt, which at least initially is in a molten state, and a filler material, preferably limestone or other similar mineral filler, dispersed throughout the molten asphalt. In addition, the composition includes a small amount of glass in the form of glass fiber bundles dispersed throughout the asphalt. The glass fiber bundles are made of monofilaments bonded together and are preselected to affect the viscosity of the molten asphalt in a predetermined way depending upon the temperature of the asphalt.

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Inventors: Shepherd, Philip Bickford (Sedalia, CO, US)
Croop, Robert William (Littleton, CO, US)

Application Number: 441524
Filing Date: 1974-02-11
Publication_date: 1976-01-06
Assignee: Johns-Manville Corporation (Denver, CO)
Primary Class(es): 442/136 106/282, 428/443
Other Classes:
US Patent Ref:

2619675	Dec, 1952	Woolff	106/282.
2640786	Jun, 1953	Parsons et al.	106/282.
2733159	Jan, 1956	Scoggin et al.	106/282.
2771387	Nov, 1956	Kleist et al.	117/126.
2893889	Jul, 1959	Schuetz et al.	117/126.
3015582	Jan, 1962	Simison	117/126.
3216888	Nov, 1965	Cacossa et al.	106/282.
3332830	Jul, 1967	Tomlinson et al.	117/126.
3808164	Apr, 1974	Gulino et al.	106/282.

Other Refs:
Primary Examiner: Lusignan, Michael R.
Assistant Examiner:
Attorney: Krone; Robert M., Shear; Stephen C.