US2986490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making molded pulp articles
Assignee: Keyes Fibre Corp
•
Filing: 1955-10-07
•
Granted: 1961-05-30
•
Expires: 1975-10-07
Abstract
No abstract record available.
Inventors
- 👤 Walter H Randall
- 👤 Richard L Emery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:27
CPC Classifications
D; D21; D21J; D21J7/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
98 words
IN A METHOD OF MOLDING PULP ARTICLES, INCLUDING THE STEPS OF IMMERSING INTO A LIQUID PULP SLURRY A FORAMINOUS MOLD UNDER SUCTION TO DEPOSIT A LAYER OF WET PULP THEREON WHICH INITIALLY FORMS A MOLDED PULP ARTICLE, AND REMOVING THE MOLD FROM THE SLURRY, THE IMPROVEMENTS WHICH COMPRISE FREE DRYING THE WET PULP ARTICLE WITHOUT COMPRESSION TO A MOISTURE CONTENT OF ABOUT 10 TO ABOUT 75% BASED ON THE TOTAL WET WEIGHT AND THEN SUBJECTING THE PARTIALLY DRIED ARTICLE TO COMPRESSION BETWEEN HEATED DIES TO REMOVE THE REMAINING MOISTURE AND IMPART A SMOOTH SURFACE FINISH TO THE ARTICLE.
References Cited (Backward Citations)
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US2046750A
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US2080077A
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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) | 1964-05-29 | 1964-11-28 | 1965-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-29 | 1968-11-28 | 1969-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-29 | 1972-11-28 | 1973-05-30 | $7700.00 | Window Closed / Lapsed |