US2716072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methylcellulose composition and method
Assignee: Dow Chemical Co
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Filing: 1951-06-05
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Granted: 1955-08-23
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Expires: 1971-06-05
Abstract
No abstract record available.
Inventors
- 👤 William J Hanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:15
CPC Classifications
C; C08; C08L; C08L1/00; C08L1/08; C08L1/26; C08L1/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A FREE-FLOWING PULVERULENT METHYLFCELLULOSE COMPOSITION, ADAPTED READILY TO WET WITH AND DISSOLVE IN WATER OVER A TEMPERATURE RANGE OF 0* -40* C., WHICH COMPRISES 30-70 PER CENT BY WEIGHT OF METHYLCELLULOSE OF PARTICLE SIZE OF 60 SCREEN MESH AND SMALLER (TYLER SCREEN SERIES), 20-50 PER CENT BY WEIGHT OF SODIUM ACETATE, AND 10-20 PER CENT BY WEIGHT OF A SOLID SYNTHETIC ANIONIC WETTING AGENT OF THE FORMULA,
Claim 2
Dependent Claim
67 words
A FREE-FLOWING PULVERULENT METHYLFCELLULOSE COMPOSITION, ADAPTED READILY TO WET WITH AND DISSOLVE IN WATER OVER A TEMPERATURE RANGE OF 0* -40* C., WHICH COMPRISES 30-70 PER CENT BY WEIGHT OF METHYLCELLULOSE OF PARTICLE SIZE OF 60 SCREEN MESH AND SMALLER (TYLER SCREEN SERIES), 20-50 PER CENT BY WEIGHT OF SODIUM ACETATE, AND 10-20 PER CENT BY WEIGHT OF A SOLID SYNTHETIC ANIONIC WETTING AGENT OF THE FORMULA,
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) | 1958-08-22 | 1959-02-21 | 1959-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-22 | 1963-02-21 | 1963-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-22 | 1967-02-21 | 1967-08-23 | $7700.00 | Window Closed / Lapsed |