US3003985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solution of polypyrrolidone in a mixture of chloral hydrate and water, and process of making same
Assignee: Solutia Inc
•
Filing: 1959-05-27
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Granted: 1961-10-10
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Expires: 1979-05-27
Abstract
No abstract record available.
Inventors
- 👤 William B Black
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:32
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/091; C08J3/095; D; D01; D01F; D01F6/00; D01F6/58; D01F6/60; C08J2377/00; C08J2377/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A NEW COMPOSITION OF MATTER COMPRISING POLYPYRROLIDONE AND A SOLVENT SELECTED FROM THE GROUP CONSISTING OF CHLORAL HYDRATE AND A MIXED SOLVENT CONTAINING CHLORAL HYDRATE AND UP TO 70 PERCENT WATER, BASED ON THE TOTAL WEIGHT OF SAID MIXED SOLVENT.
Claim 2
Dependent Claim
40 words
A NEW COMPOSITION OF MATTER COMPRISING POLYPYRROLIDONE AND A SOLVENT SELECTED FROM THE GROUP CONSISTING OF CHLORAL HYDRATE AND A MIXED SOLVENT CONTAINING CHLORAL HYDRATE AND UP TO 70 PERCENT WATER, BASED ON THE TOTAL WEIGHT OF SAID MIXED SOLVENT.
References Cited (Backward Citations)
US2752320A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-09 | 1965-04-10 | 1965-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-09 | 1969-04-10 | 1969-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-09 | 1973-04-10 | 1973-10-10 | $7700.00 | Window Closed / Lapsed |