US3018192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulosic sponge manufacture
Assignee: Akzona Inc
•
Filing: 1958-07-30
•
Granted: 1962-01-23
•
Expires: 1978-07-30
Abstract
No abstract record available.
Inventors
- 👤 Hennemann George
- 👤 Lutgerhorst Albertus Gerardus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:18
CPC Classifications
C; C08; C08J; C08J9/00; C08J2301/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
IN A PROCESS FOR THE PRODUCTION OF ARTIFICIAL SPONGES OF REGENERATED CELLULOSE, THE IMPROVEMENT COMPRISING TREATING THE SPONGES WITH A MATERIAL SELECTED FROM THE GROUP CONSISTING OF REACTION PRODUCTS OF CARBOXY METHYL CELLULOSE AND A QUATERNARY AMMONIUM COMPOUND OF HIGH MOLECULAR WEIGHT, AND REACTION PRODUCTS OF AN ALKALI METAL SALT OF CARBOXY METHYL CELLULOSE AND A QUATERNARY AMMONIUM COMPOUND OF HIGH MOLECULAR WEIGHT.
Claim 2
Dependent Claim
63 words
IN A PROCESS FOR THE PRODUCTION OF ARTIFICIAL SPONGES OF REGENERATED CELLULOSE, THE IMPROVEMENT COMPRISING TREATING THE SPONGES WITH A MATERIAL SELECTED FROM THE GROUP CONSISTING OF REACTION PRODUCTS OF CARBOXY METHYL CELLULOSE AND A QUATERNARY AMMONIUM COMPOUND OF HIGH MOLECULAR WEIGHT, AND REACTION PRODUCTS OF AN ALKALI METAL SALT OF CARBOXY METHYL CELLULOSE AND A QUATERNARY AMMONIUM COMPOUND OF HIGH MOLECULAR WEIGHT.
References Cited (Backward Citations)
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Cited
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Cited
US2137465A
Cited
GB578404A
Cited
US2609270A
Cited
US2853414A
Cited
US2955958A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-22 | 1965-07-24 | 1966-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-22 | 1969-07-24 | 1970-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-22 | 1973-07-24 | 1974-01-23 | $7700.00 | Window Closed / Lapsed |