US3738853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Articles produced by casting of sulfur asphalt
Assignee: Shell USA Inc
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Filing: 1971-10-05
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Granted: 1973-06-12
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Expires: 1991-10-05
Abstract
Abstract SULFUR-ASPHALT PAVEMENTS AND CONSTRUCTION ARTICLES ARE PRODUCED BY CASTING SULFUR-ASPHALT-AGGREGATE MIXES IN FORMS WITHOUT THE APPLICATION OF DENSIFICATION PRESSURE THE MIXES EMPLOYED TO PRODUCE THE CAST ARTICLES HAVE WEIGHT RATIOS OF SULFUR TO ASPHALT OF AT LEAST 1:1.
Inventors
- 👤 O Kopvillem
- 👤 Lean J Mac
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:23
CPC Classifications
E; E01; E01C; E01C7/00; E01C7/08; E01C7/18; E01C7/26; E01C7/267; C; C08; C08K; C08K3/00; C08K3/02; C08K3/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |