US2857341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steeping process for preparing foamable styrene polymer particles containing fatty acid compound
Assignee: Monsanto Chemicals Ltd
•
Filing: 1955-12-28
•
Granted: 1958-10-21
•
Expires: 1975-12-28
Abstract
No abstract record available.
Inventors
- 👤 Robert E Colwell
- 👤 Platzer Norbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:11
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/16; C08J9/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
190 words
THE METHOD FOR PREPARING FOAMABLE PARTICLES OF A STYRENE POLYMER WHICH CONSISTS OF STEEPING PARTICLES OF A STYRENE POLYMER COMPOSITION IN A LIQUID ALIPHATIC HYDROCARBON BOILING WITHIN THE RANGE OF ABOUT 10-80* C.; SAID STYRENE POLYMER COMPOSITION CONSISTING OF 100 PARTS OF A STYRENE POLYMER HAVING ABOUT 0.5-20 PARTS OF A FATTY ACID COMPOUND INTIMATELY INCORPORATED THROUGHOUT THE STYRENE POLYMER; SAID STYRENE POLYMER BEING SELECTED FROM THE GROUP CONSISTING OF (A) A HOMOPOLYMER OF A MONOMER SELECTED FROM THE GROUP CONSISTING OF STYRENE, VINYL TOLUENE, P-ETHYLSTYRENE, AND 2,4-DIMETHYLSTYRENE, (B) AN INTERPOLYMER CONSISTING SOLELY OF AT LEAST 2 MONOMERS SELECTED FROM THE GROUP CONSISTING OF STYRENE, ALPHA-METHYLSTYRENE, VINYL TOLUENE, P-ETHYLSTYRENE AND 2,4-DIMETHYLSTYRENE, AND (C) AN INTERPOLYMER OF AT LEAST 85 WEIGHT PERCENT OF A MONOMER SELECTED FROM THE GROUP CONSISTING OF STYRENE, ALPHA-METHYLSTYRENE, VINYL TOLUENE, P-ETHYLSTYRENE, 2,4-DIMETHYLSTYRENE AND MIXTURES THEREOF WITH UP TO 15 WEIGHT PERCENT OF BUTADIENE; SAID FATTY ACID COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF FATTY ACIDS CONTAINING 12-20 CARBON ATOMS IN THEIR STRUCTURE AND THE SALTS AND MONOESTERS THEREOF; SAID PARTICLES OF THE STYRENE POLYMER COMPOSITION HAVING AN AVERAGE PARTICLE SIZE OF LESS THAN 10 MESH.
Claim 2
Independent Claim
190 words
THE METHOD FOR PREPARING FOAMABLE PARTICLES OF A STYRENE POLYMER WHICH CONSISTS OF STEEPING PARTICLES OF A STYRENE POLYMER COMPOSITION IN A LIQUID ALIPHATIC HYDROCARBON BOILING WITHIN THE RANGE OF ABOUT 10-80* C.; SAID STYRENE POLYMER COMPOSITION CONSISTING OF 100 PARTS OF A STYRENE POLYMER HAVING ABOUT 0.5-20 PARTS OF A FATTY ACID COMPOUND INTIMATELY INCORPORATED THROUGHOUT THE STYRENE POLYMER; SAID STYRENE POLYMER BEING SELECTED FROM THE GROUP CONSISTING OF (A) A HOMOPOLYMER OF A MONOMER SELECTED FROM THE GROUP CONSISTING OF STYRENE, VINYL TOLUENE, P-ETHYLSTYRENE, AND 2,4-DIMETHYLSTYRENE, (B) AN INTERPOLYMER CONSISTING SOLELY OF AT LEAST 2 MONOMERS SELECTED FROM THE GROUP CONSISTING OF STYRENE, ALPHA-METHYLSTYRENE, VINYL TOLUENE, P-ETHYLSTYRENE AND 2,4-DIMETHYLSTYRENE, AND (C) AN INTERPOLYMER OF AT LEAST 85 WEIGHT PERCENT OF A MONOMER SELECTED FROM THE GROUP CONSISTING OF STYRENE, ALPHA-METHYLSTYRENE, VINYL TOLUENE, P-ETHYLSTYRENE, 2,4-DIMETHYLSTYRENE AND MIXTURES THEREOF WITH UP TO 15 WEIGHT PERCENT OF BUTADIENE; SAID FATTY ACID COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF FATTY ACIDS CONTAINING 12-20 CARBON ATOMS IN THEIR STRUCTURE AND THE SALTS AND MONOESTERS THEREOF; SAID PARTICLES OF THE STYRENE POLYMER COMPOSITION HAVING AN AVERAGE PARTICLE SIZE OF LESS THAN 10 MESH.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |