US3337355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid foamed sulphur and process for the manufacture thereof
Assignee: Southwest Patents Inc
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Filing: 1965-02-04
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Granted: 1967-08-22
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Expires: 1985-02-04
Abstract
No abstract record available.
Inventors
- 👤 John M Dale
- 👤 Allen C Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:28
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/02; C01B17/0243; C04; C04B; C04B28/00; C04B28/36; Y; Y10; Y10S; Y10S264/00; Y10S264/05; Y10S264/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
THE PROCESS OF MAKING FOAMED SULPHUR COMPPRISING (A) HEATING SULPHUR TO ABOVE ITS MELTING POINT, (B) BLENDING A STABILIZING AGENT WITH THE MOLTEN SULPHUR, (C) BLENDING A VISCOSITY INCREASER WITH THE MOLTEN SULPHUR, STEPS (B) AND (C) BEING TAKEN IN EITHER ORDER WITH RESPECT TO EACH OTHER, (D) FORMING BUBBLES IN THE MOLTEN SULPHUR, AND (E) COOLING THE MOLTEN SULPHUR TO BELOW ITS MELTING POINT.
Claim 2
Dependent Claim
65 words
THE PROCESS OF MAKING FOAMED SULPHUR COMPPRISING (A) HEATING SULPHUR TO ABOVE ITS MELTING POINT, (B) BLENDING A STABILIZING AGENT WITH THE MOLTEN SULPHUR, (C) BLENDING A VISCOSITY INCREASER WITH THE MOLTEN SULPHUR, STEPS (B) AND (C) BEING TAKEN IN EITHER ORDER WITH RESPECT TO EACH OTHER, (D) FORMING BUBBLES IN THE MOLTEN SULPHUR, AND (E) COOLING THE MOLTEN SULPHUR TO BELOW ITS MELTING POINT.
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) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |