Patent US2891256A successfully refreshed from Google Patents.
Patent USRE27927E successfully refreshed from Google Patents.
USRE27927E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foamable thermoplastic polymer granules and method for making
Assignee: —
•
Filing: 1973-03-08
•
Granted: 1974-02-19
•
Expires: 1993-03-08
Abstract
Abstract FOAMABLE STYRENE POLYMERS ARE PREPARED BY INCORPORATING WITHIN THE PARTICLES AN ALKALI METAL SALT OF LONG CHAIN OR AROMATIC CARBOXYLIC ACIDS. IMPROVED FUSION,LOW COOLING TIME AND ANTI-CLUMPING PROPERTIES ARE OBTAINED.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:58
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08J9/0023; C08J9/16; C08K; C08K5/00; C08K5/04; C08K5/09; C08J2325/00
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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |