Patent US2806830A successfully refreshed from Google Patents.
US2806830A
Expired / Lapsed
US
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Polyamide solutions and process of preparing same
Assignee: Solutia Inc
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Filing: 1955-06-21
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Granted: 1957-09-17
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Expires: 1975-06-21
Abstract
No abstract record available.
Inventors
- 👤 Witt Hobson D De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:07
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/091; C08J3/095; C08J2377/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
AS A NEW COMPOSITION OF MATTER, A CLEAR HOMOGENEOUS SOLUTION COMPRISING A SYNTHETIC LINEAR POLYAMIDE, WHICH UPON HYDROLYSIS WITH STRONG MINERAL ACIDS YIELDS MONOMERIC POLYAMIDE-FORMING REACTANTS, DISSOLVED IN A SOLVENT SELECTED FROM THE GROUP CONSISTING OF GLUTARIC ACID AND MIXTURES OF GLUTARIC ACID WITH NOT MORE THAN 20 PERCENT BY WEIGHT OF WATER.
Claim 2
Dependent Claim
53 words
AS A NEW COMPOSITION OF MATTER, A CLEAR HOMOGENEOUS SOLUTION COMPRISING A SYNTHETIC LINEAR POLYAMIDE, WHICH UPON HYDROLYSIS WITH STRONG MINERAL ACIDS YIELDS MONOMERIC POLYAMIDE-FORMING REACTANTS, DISSOLVED IN A SOLVENT SELECTED FROM THE GROUP CONSISTING OF GLUTARIC ACID AND MIXTURES OF GLUTARIC ACID WITH NOT MORE THAN 20 PERCENT BY WEIGHT OF WATER.
References Cited (Backward Citations)
US2265119A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |