Patent US3887754A successfully refreshed from Google Patents.
US3887754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Particulate expandable styrene polymers having desirable processing properties
Assignee: BASF SE
•
Filing: 1973-05-30
•
Granted: 1975-06-03
•
Expires: 1993-05-30
Abstract
Abstract Particulate expandable styrene polymers having a short minimum mold resistance time and characterized by a coating of an amide of phthalic acid, dihydrophthalic acid or tetrahydrophthalic acid.
Inventors
- 👤 Manfred Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:26
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/22; C08J9/224; C08J2325/00; C08J2325/02; C08J2325/04; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
35 words
PARTICULATE EXPANDABLE STYRENE POLYMERS HAVING SHORT MINIMUM RESIDENCE TIMES IN THE MOLD AND HAVING A COATING OF FROM 0.05 TO 2% BY WEIGHT OF A CARBOXAMIDE MELTING BETWEEN 50* AND 110* AND HAVING THE FORMULA
Claim 2
Dependent Claim
35 words
PARTICULATE EXPANDABLE STYRENE POLYMERS HAVING SHORT MINIMUM RESIDENCE TIMES IN THE MOLD AND HAVING A COATING OF FROM 0.05 TO 2% BY WEIGHT OF A CARBOXAMIDE MELTING BETWEEN 50* AND 110* AND HAVING THE FORMULA
Claim 3
Dependent Claim
35 words
Particulate expandable styrene polymers having short minimum residence times in the mold and having a coating of from 0.05 to 2% by weight of a carboxamide melting between 50* and 110*C and having the formula
Claim 4
Dependent Claim
35 words
Particulate expandable styrene polymers having short minimum residence times in the mold and having a coating of from 0.05 to 2% by weight of a carboxamide melting between 50* and 110*C and having the formula
Claim 5
Dependent Claim
21 words
Particulate expandable styrene polymers as set forth in claim 1 wherein the amount of said coating is from 0.1 to 0.6%.
Claim 6
Dependent Claim
23 words
Particulate expandable styrene polymers as set forth in claim 1 wherein said polymers have a particle diameter of from 0.1 to 6 mm.
References Cited (Backward Citations)
US3298994A
Cited
US3429737A
Cited
US3461088A
Cited
US3637538A
Cited
US3663466A
Cited
US3763059A
Cited
US3793242A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |