US2802405A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous article and method of making the same
Assignee: Individual
•
Filing: 1952-04-24
•
Granted: 1957-08-13
•
Expires: 1972-04-24
Abstract
No abstract record available.
Inventors
- 👤 Christopher J Krogel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:52
CPC Classifications
D; D21; D21J; D21J7/00; B; B01; B01D; B01D27/00; B01D27/005; B01D29/00; B01D29/11; B01D29/111; B01D29/114; B01D39/00; B01D39/14; B01D39/16; B01D39/1607; B01D39/1615; B01D39/18; B01D46/00; B01D46/24; B01D2239/00; B01D2239/10
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
123 words
THE METHOD OF FORMING A POROUS ARTICLE WITH THE USE OF A PERFORATED MOLD COMPRISING THE STEPS OF MECHANCIALLY DEFIBERING IN A PULPER A QUANTITY OF VEGETABLE FIBER PULP CONTAINING NOT MORE THAN 20% WATER IN A LIQUID MEDIUM COMPOSED PRIMARILY OF LIQUID OF VEGETABLE STANTIALLY NO AFFINITY FOR THE PULP FIBERS AND TAKEN FROM A GROUP CONSISTING OF ALCOHOL AND ACETONE AND CONTAINING NOT MORE THAN 30% WATER, USING THE LIQUID AS A CARRIER FOR THE DEFIBERED PULP, CASING THE LIQUID TO FLOW THROUGH THE PERFORATED MOLD AND IN FLOWING THUS CAUSE THE DEFIBERED PULP TO PILE UP AND FORM AN ARTICLE, AND PASSING THE LIQUID FLOWING THROUGH SAID MOLD TO A STORAGE TANK FOR USE PULPING AND MOLDING IN SUCCEEDING CYCLES.
Claim 2
Independent Claim
123 words
THE METHOD OF FORMING A POROUS ARTICLE WITH THE USE OF A PERFORATED MOLD COMPRISING THE STEPS OF MECHANCIALLY DEFIBERING IN A PULPER A QUANTITY OF VEGETABLE FIBER PULP CONTAINING NOT MORE THAN 20% WATER IN A LIQUID MEDIUM COMPOSED PRIMARILY OF LIQUID OF VEGETABLE STANTIALLY NO AFFINITY FOR THE PULP FIBERS AND TAKEN FROM A GROUP CONSISTING OF ALCOHOL AND ACETONE AND CONTAINING NOT MORE THAN 30% WATER, USING THE LIQUID AS A CARRIER FOR THE DEFIBERED PULP, CASING THE LIQUID TO FLOW THROUGH THE PERFORATED MOLD AND IN FLOWING THUS CAUSE THE DEFIBERED PULP TO PILE UP AND FORM AN ARTICLE, AND PASSING THE LIQUID FLOWING THROUGH SAID MOLD TO A STORAGE TANK FOR USE PULPING AND MOLDING IN SUCCEEDING CYCLES.
Claim 3
Dependent Claim
37 words
A POROUS ARTICLE MOLDED OF VEGETABLE PULP FIBERS, HAVING A THICKNESS GREATER THAN 1/4 INCH AND A DENSITY OF PULP CONTENT OF LESS THAN 3 GRAMS PER CUBIC INCH, AND PREPARED BY THE METHOD OF CLAIM 1.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-12 | 1961-02-11 | 1961-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-12 | 1965-02-11 | 1965-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-12 | 1969-02-11 | 1969-08-13 | $7700.00 | Window Closed / Lapsed |