Patent US2698840A successfully refreshed from Google Patents.
US2698840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of monovinyl aromatic compounds and linoleic acid esters
Assignee: Armstrong World Industries Inc
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Filing: 1952-08-14
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Granted: 1955-01-04
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Expires: 1972-08-14
Abstract
No abstract record available.
Inventors
- 👤 Dyer Elizabeth
- 👤 George A Weisgerber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:40
CPC Classifications
C; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08; C08F220/00; C08F220/62; C08F220/68; C09; C09D; C09D125/00; C09D125/02; C09D125/04; C09D125/08; C09D125/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
A CLEAR, HARD, RESINOUS COPOLYMER OF A MONOVINYL AROMATIC COMPOUND AND THE PRODUCT OBTAINED BY ESTERIFYING LINOLEIC ACID WITH 1,2-DIHYDROXY-3-BUTENE.
Claim 2
Dependent Claim
20 words
A CLEAR, HARD, RESINOUS COPOLYMER OF A MONOVINYL AROMATIC COMPOUND AND THE PRODUCT OBTAINED BY ESTERIFYING LINOLEIC ACID WITH 1,2-DIHYDROXY-3-BUTENE.
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) | 1958-01-03 | 1958-07-05 | 1959-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-03 | 1962-07-05 | 1963-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-03 | 1966-07-05 | 1967-01-04 | $7700.00 | Window Closed / Lapsed |