US2809955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilizing alkenyl aromatic resins against weathering
Assignee: Dow Chemical Co
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Filing: 1954-01-27
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Granted: 1957-10-15
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Expires: 1974-01-27
Abstract
No abstract record available.
Inventors
- 👤 Lorne A Matheson
- 👤 Raymond F Boyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:51
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/36; A; A01; A01K; A01K79/00; C08K; C08K5/00; C08K5/16; C08K5/17; G; G01; G01S; G01S1/00; G01S1/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A MOLDING COMPOSITION A SUBSTANTIALLY HOMOGENEOUS MIXTURE OF POLYSTYRENE AND, AS AGENT FOR STABILIZING THE SAME AGAINST DISCOLORATION AND IMPAIRMENT OF ITS MECHANICAL PROPERTIES BY OUT-OF-DOOR WEATHERING FROM 0.05 TO 5 PERCENT BY WEIGHT OF TETRAMETHYLDIAMINO2-PROPANOL.
Claim 2
Dependent Claim
36 words
A MOLDING COMPOSITION A SUBSTANTIALLY HOMOGENEOUS MIXTURE OF POLYSTYRENE AND, AS AGENT FOR STABILIZING THE SAME AGAINST DISCOLORATION AND IMPAIRMENT OF ITS MECHANICAL PROPERTIES BY OUT-OF-DOOR WEATHERING FROM 0.05 TO 5 PERCENT BY WEIGHT OF TETRAMETHYLDIAMINO2-PROPANOL.
References Cited (Backward Citations)
US2681328A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |