US3207820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing polystyrene beads for molding
Assignee: OI Glass Inc
•
Filing: 1962-04-09
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Granted: 1965-09-21
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Expires: 1982-04-09
Abstract
No abstract record available.
Inventors
- 👤 Gus S Scarvelis
- 👤 George R Zaloudek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:06
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/22; B; B29; B29C; B29C44/00; B29C44/34; B29C44/3461; C08J2325/00; C08J2325/02; C08J2325/04; C08J2325/06; Y; Y10; Y10S; Y10S264/00; Y10S264/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A METHOD OF CONDITIONING WET, PRE-EXPANDED POLYSTYRENE BEADS FOR IMMEDIATE MOLDING, WHICH COMPRISES, CONVEYING SAID WET PRE-EXPANDED BEADS IN A HEATED ATMOSPHERE, WHEREBY SAID BEADS ARE HEATED AND THE MOISTURE OF THE BEADS TRANSFERRED TO THE ATMOSPHERE, AND SEPARATING SAID MOISTURE LADEN ATMOSPHERE FROM SAID BEADS.
Claim 2
Independent Claim
46 words
A METHOD OF CONDITIONING WET, PRE-EXPANDED POLYSTYRENE BEADS FOR IMMEDIATE MOLDING, WHICH COMPRISES, CONVEYING SAID WET PRE-EXPANDED BEADS IN A HEATED ATMOSPHERE, WHEREBY SAID BEADS ARE HEATED AND THE MOISTURE OF THE BEADS TRANSFERRED TO THE ATMOSPHERE, AND SEPARATING SAID MOISTURE LADEN ATMOSPHERE FROM SAID BEADS.
References Cited (Backward Citations)
US3013996A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |