Patent US2132981A successfully refreshed from Google Patents.
Patent US2816890A successfully refreshed from Google Patents.
US2816890A
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High melting interpolymers of monovinyl aromatic compounds
Assignee: Monsanto Chemicals Ltd
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Filing: 1955-08-16
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Granted: 1957-12-17
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Expires: 1975-08-16
Abstract
No abstract record available.
Inventors
- 👤 Baer Massimo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:39
CPC Classifications
C; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08; C08F220/00; C08F220/02; C08F220/04; C08F220/06; C08F212/12; Y; Y10; Y10S; Y10S526/00; Y10S526/94
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
AN INTERPOLYMER CONSISTING OF 40-75 WEIGHT PERCENT OF A MONOVINYL AROMATIC COMPOUND OF THE GROUP CONSISTING OF STYRENE, VINYL TOLUENE, AND MIXTURES THEREOF, 15-45 WEIGHT PRECENT OF AN ISOPROPENYL AROMATIC COMPOUND OF THE GROUP CONSISTING OF ISOPROPENYLBENZENE, ISOPROPENYLTOLUENE, AND MIXTURES THEREOF, AND 8-20 WEIGHTT PERCENT OF A MONOMER SELECTED FROM THE GROUP CONSISTING TURES THEREOF.
Claim 2
Dependent Claim
55 words
AN INTERPOLYMER CONSISTING OF 40-75 WEIGHT PERCENT OF A MONOVINYL AROMATIC COMPOUND OF THE GROUP CONSISTING OF STYRENE, VINYL TOLUENE, AND MIXTURES THEREOF, 15-45 WEIGHT PRECENT OF AN ISOPROPENYL AROMATIC COMPOUND OF THE GROUP CONSISTING OF ISOPROPENYLBENZENE, ISOPROPENYLTOLUENE, AND MIXTURES THEREOF, AND 8-20 WEIGHTT PERCENT OF A MONOMER SELECTED FROM THE GROUP CONSISTING TURES THEREOF.
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) | 1960-12-16 | 1961-06-17 | 1961-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-16 | 1965-06-17 | 1965-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-16 | 1969-06-17 | 1969-12-17 | $7700.00 | Window Closed / Lapsed |