US3389199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making a reinforced cellular thermoplastic sheet
Assignee: Armstrong World Industries Inc
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Filing: 1962-06-01
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Granted: 1968-06-18
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Expires: 1982-06-01
Abstract
No abstract record available.
Inventors
- 👤 Jr Collins E Bushnell
- 👤 Harry F Long
- 👤 Richard C Stadden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:13
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/3442; B29C44/3446; B29C44/3453; B29C44/02; B29C44/04; B29C44/0461; B29C70/00; B29C70/04; B29C70/06; B29C70/08; C; C08; C08J; C08J7/00; C08J7/02; Y; Y10; Y10S; Y10S264/00; Y10S264/82; Y10S521/00; Y10S521/91; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249981; Y10T428/249987; Y10T428/249988; Y10T428/249989
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A METHOD FOR PRODUCING FOAM SURFACED POLYSTYRENE ARTICLES WHICH COMPRISES STEEPING THE SURFACE AREA TO BE FOAMED OF THE POLYSTYRENE ARTICLES IN A LIQUID FOAMING AGENT CONSISTING OF A MIXTURE OF TRICHLOROMONOFLUOROMETHANE AND METHYLENE CHLORIDE FOR A PERIOD OF TIME SUFFICIENT TO ACHIEVE PARTIAL PENETRATION OF SAID FOAMING AGENT THROUGH THE ARTICLES, SAID TRICHLOROMONOFLUOROMETHANE BEING PRESENT IN SAID FOAMING AGENT MIXTURE IN THE AMOUNT OF AT LEAST 90% BASED ON THE TOTAL WEIGHT OF THE MIXTURE, REMOVING THE POLYSTYRENE ARTICLES FROM SAID FOAMING AGENT AND HEATING THE ARTICLES TO PRODUCE FOAMED SURFACES AT THE AREA HEATED AND WHICH WAS IN CONTACT WITH THE FOAMING AGENT.
Claim 2
Independent Claim
105 words
A METHOD FOR PRODUCING FOAM SURFACED POLYSTYRENE ARTICLES WHICH COMPRISES STEEPING THE SURFACE AREA TO BE FOAMED OF THE POLYSTYRENE ARTICLES IN A LIQUID FOAMING AGENT CONSISTING OF A MIXTURE OF TRICHLOROMONOFLUOROMETHANE AND METHYLENE CHLORIDE FOR A PERIOD OF TIME SUFFICIENT TO ACHIEVE PARTIAL PENETRATION OF SAID FOAMING AGENT THROUGH THE ARTICLES, SAID TRICHLOROMONOFLUOROMETHANE BEING PRESENT IN SAID FOAMING AGENT MIXTURE IN THE AMOUNT OF AT LEAST 90% BASED ON THE TOTAL WEIGHT OF THE MIXTURE, REMOVING THE POLYSTYRENE ARTICLES FROM SAID FOAMING AGENT AND HEATING THE ARTICLES TO PRODUCE FOAMED SURFACES AT THE AREA HEATED AND WHICH WAS IN CONTACT WITH THE FOAMING AGENT.
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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) | 1971-06-18 | 1971-12-18 | 1972-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-18 | 1975-12-18 | 1976-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-18 | 1979-12-18 | 1980-06-18 | $7700.00 | Window Closed / Lapsed |