US2914493A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulose sponge composition containing polyethylene terephthalate fiber and method of making
Assignee: Akzona Inc
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Filing: 1957-02-04
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Granted: 1959-11-24
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Expires: 1977-02-04
Abstract
No abstract record available.
Inventors
- 👤 Koot Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:44
CPC Classifications
C; C08; C08J; C08J9/00; C08J2301/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
49 words
SPONGE-FORMING COMPOSITION COMPRISING VISCOSE 0.5-3.0% BY WEIGHT OF REINFORCING STAPLE FIBERS COMPOSED OF 5-30% BY WEIGHT OF POLYTHYLENE TEREPHTHALATE STAPLE FIBES AND THE REMAINDER SELECTED FROM THE GROUP CONSISTING OF JUTE, HEMP, FLAX, RAYON AND COTTON, AND GRANULES OF A PORE-FORMING MATERIAL, SAID PORE-FORMING MATERIAL BEING SODIUM SULFATE DECAHYDRATE.
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) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |