Patent US2731015A successfully refreshed from Google Patents.
US2731015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Artificial sponge and method of making it
Assignee: Commonwealth Engineering Company of Ohio
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Filing: 1953-03-16
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Granted: 1956-01-17
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Expires: 1973-03-16
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry A Toulmin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:45
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/425; A61L15/22; A61L15/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A FIRM, WATER-PERMEABLE, SUBSTANTIALLY WATER-INSOLUBLE SPONGE-LIKE PRODUCT CONSISTING ESENTIALLY OF A POROUS MASS OF A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF DEXTRANS AND DETRAN CONVERSION PRODUCTS, SAID MASS HAVING, IN CROSS-SECTION, A CELLULAR, FOAM-LIKE STRUCTURE.
Claim 2
Dependent Claim
36 words
A FIRM, WATER-PERMEABLE, SUBSTANTIALLY WATER-INSOLUBLE SPONGE-LIKE PRODUCT CONSISTING ESENTIALLY OF A POROUS MASS OF A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF DEXTRANS AND DETRAN CONVERSION PRODUCTS, SAID MASS HAVING, IN CROSS-SECTION, A CELLULAR, FOAM-LIKE STRUCTURE.
References Cited (Backward Citations)
GB402055A
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US2372669A
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US2418211A
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US2465357A
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US2461746A
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US2512463A
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US2613189A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-16 | 1959-07-18 | 1960-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-16 | 1963-07-18 | 1964-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-16 | 1967-07-18 | 1968-01-17 | $7700.00 | Window Closed / Lapsed |