US3965281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for paving surfaces with granular, flaky or powdery asphalt
Assignee: Mitsuboshi Sangyo Co Ltd
•
Filing: 1973-09-20
•
Granted: 1976-06-22
•
Expires: 1993-09-20
Abstract
Abstract Surfaces of roads, bridges, floors, etc., are easily paved by using a mixture of at least one of granular, powdery and flaky asphalt material and a suitable paving aggregate and applying heat and press thereto at the working site.
Inventors
- 👤 Takashi Takase
- 👤 Tsunekazu Hayashi
- 👤 Hirokazu Saitoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:45
CPC Classifications
D; D06; D06N; D06N5/00; E; E01; E01C; E01C7/00; E01C7/08; E01C7/18; E04; E04B; E04B1/00; E04B1/62; E04B1/66; E04B1/68; E04D; E04D5/00; E04D5/02; E04D7/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
128 words
A method for paving surfaces with asphalt which comprises forming a mixture consisting of (1) powdery or granular asphalt having a diameter of from about 0.074 to about 10 mm or flaky asphalt having a thickness of from about 0.3 to about 0.5 mm and a width and length of from about 2 to about 4mm, said asphalts having a softening point of not greater than 95°C as measured by the Ring and Ball method and a penetration of from 35 to 80 as measured at 25°C, 100 g, 5 sec., and (2) a suitable dried aggregate, the proportion of the asphalt in said mixture being from 4 to 9% by weight, spreading said mixture on the surface to be paved, and pressing the mixture onto said surface.
Claim 2
Independent Claim
128 words
A method for paving surfaces with asphalt which comprises forming a mixture consisting of (1) powdery or granular asphalt having a diameter of from about 0.074 to about 10 mm or flaky asphalt having a thickness of from about 0.3 to about 0.5 mm and a width and length of from about 2 to about 4mm, said asphalts having a softening point of not greater than 95°C as measured by the Ring and Ball method and a penetration of from 35 to 80 as measured at 25°C, 100 g, 5 sec., and (2) a suitable dried aggregate, the proportion of the asphalt in said mixture being from 4 to 9% by weight, spreading said mixture on the surface to be paved, and pressing the mixture onto said surface.
Claim 3
Dependent Claim
20 words
A method according to claim 1, wherein the mixture is heated while said mixture is being pressed onto said surface.
Claim 4
Dependent Claim
34 words
A method according to claim 2, wherein the mixing step is carried out at ambient temperature, and the mixture is pressed onto said surface with a roller at a temperature of 150 to 200°C.
Claim 5
Dependent Claim
18 words
The method according to claim 1, wherein the asphalt is straight-run asphalt, blown asphalt or a mixture thereof.
Claim 6
Dependent Claim
54 words
A method according to claim 1, wherein the asphalt is powdery asphalt having a temperature of ambient temperature and a particle size of 0.1 to 1 mm, the dried aggregate is heated to from 210° to 220°C, and the mixture is flattened onto said surface by means of a gussasphalt finisher or a trowel.
Claim 7
Dependent Claim
45 words
A method according to claim 1, wherein the asphalt is mixed with the dried aggregate at ambient temperature, the mixture is spread onto the surface of previously heated voids or cracks, and the mixture is pressed onto said surface by means of a hand roller.
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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) | 1979-06-22 | 1979-12-22 | 1980-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-22 | 1983-12-22 | 1984-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-22 | 1987-12-22 | 1988-06-22 | $7700.00 | Window Closed / Lapsed |