US3061468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of rendering foamed polystyrene surfaces flame resistant
Assignee: Dow Chemical Co
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Filing: 1960-10-06
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Granted: 1962-10-30
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Expires: 1980-10-06
Abstract
No abstract record available.
Inventors
- 👤 Tryon Ward Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:43
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/36; C08J9/365; C08J2325/00; C08J2325/02; C08J2325/04; C08J2325/06; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/24999
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A METHOD OF IMPARTING FLAME RESISTANCE TO THE SURFACE OF A FOAMED POLYSTYRENE BODY COMPRISING DEPOSITING ON SAID SURFACE A COATING OF AN INORGANIC SALT SELECTED FROM THE GROUP CONSISTING OF CALCIUM CHLORIDE, MAGNESIUM CHLORIDE, MAGNESIUM SULFATE AND A MIXTURE OF CALCIUM CHLORIDE AND MAGNESIUM CHLORIDE.
Claim 2
Independent Claim
46 words
A METHOD OF IMPARTING FLAME RESISTANCE TO THE SURFACE OF A FOAMED POLYSTYRENE BODY COMPRISING DEPOSITING ON SAID SURFACE A COATING OF AN INORGANIC SALT SELECTED FROM THE GROUP CONSISTING OF CALCIUM CHLORIDE, MAGNESIUM CHLORIDE, MAGNESIUM SULFATE AND A MIXTURE OF CALCIUM CHLORIDE AND MAGNESIUM CHLORIDE.
References Cited (Backward Citations)
US2450436A
Cited
US2920983A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-29 | 1966-04-30 | 1966-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-29 | 1970-04-30 | 1970-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-29 | 1974-04-30 | 1974-10-30 | $7700.00 | Window Closed / Lapsed |