US2687393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic fiber preparation
Assignee: Monsanto Chemicals Ltd
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Filing: 1951-01-26
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Granted: 1954-08-24
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Expires: 1971-01-26
Abstract
No abstract record available.
Inventors
- 👤 Quirino A Trementozzi
- 👤 George E Ham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:46
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/091; C08J3/096; D; D01; D01F; D01F6/00; D01F6/02; D01F6/18; C08J2333/00; C08J2333/18; C08J2333/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
63 words
A HOMOGENEOUS MISCIBLE SOLUTION OF N,N-DIMETHYLPROPIONAMIDE AND A TERNARY COPOLYMER OF A MONOMERIC SUBSTANCE OF WHICH FROM 80% TO 92% OF THE TOTAL POLYMERIZABLE MONOMER CONTENT IS ACRYLONITRILE, AT AT LEAST 2% IS A COMPOUND CONTAINING AN N-HETEROCYCLIC NUCLEUS AND A POLYMERIZABLE OLEFINIC RADICAL ON A SIDE CHAIN, AND OF WHICH UP TO 18% IS COMPRISED OF OTHER MONOOLEFINIC MONOMERS COPOLYMERIZABLE WITH ACRYLONITRILE.
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) | 1957-08-23 | 1958-02-22 | 1958-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-23 | 1962-02-22 | 1962-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-23 | 1966-02-22 | 1966-08-24 | $7700.00 | Window Closed / Lapsed |