US3111365A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for molding a uniform polymethane foam in a closed mold
Assignee: Davidson Rubber Co Inc
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Filing: 1961-01-13
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Granted: 1963-11-19
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Expires: 1981-01-13
Abstract
No abstract record available.
Inventors
- 👤 Hood Bruce Gardner
- 👤 Ralph S Hood
- 👤 Robert A Gardella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:07
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/02; B29C44/12; B29C44/1271; B29C44/34; B29C44/58; B29C44/588; B29C33/00; B29C33/38; B29C33/40; B29K; B29K2075/00; Y; Y10; Y10S; Y10S425/00; Y10S425/812
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
IN THE PROCESS OF SIMULTANEOUSLY REACTING, CURING AND MOLDING POLYURETHANE FOAM-FORMING MATERIALS INA FLAT HORIZONTAL ENCLOSED MOLD THE STEPS OF: PREPARING FOR SAID MOLD THE SEPARATE INGREDIENTS FOR A CHARGE OF SAID MATERIALS, MIXING SAID MATEIRALS AND STARTING THE REACTION THEREOF IN SUBSTANTIALLY ALL PARTS THEREOF AT SUBSTANTIALLY THE SAME MOMENT THEREAFTER, POURING THE CHARGE OF SAID MATERIALS ONTO THE FLOOR OF SAID MOLD INA TAPERED POUR PATTERN WHEREIN THE WEIGHT CONCENTRATION OF SAID MATERIALS IS SLIGHTLY GREATER AT ONE END OF SAID MOLD, CLOSING SAID MOLD, EXPANDING SAID MATERIALS INTO A FOAM WHILE EXPELLING THE AIR FROM THE MOLD GAS RELEASED BY SAID FOAM PROGRESSIVELY ALONG THE MOLD SURFACE TOWARD ONE END OF THE MOLD, COMPLETING THE CURE OF SAID FOAM, AND REMOVING THE RESULTANT MOLDED ARTICLE.
Claim 2
Dependent Claim
128 words
IN THE PROCESS OF SIMULTANEOUSLY REACTING, CURING AND MOLDING POLYURETHANE FOAM-FORMING MATERIALS INA FLAT HORIZONTAL ENCLOSED MOLD THE STEPS OF: PREPARING FOR SAID MOLD THE SEPARATE INGREDIENTS FOR A CHARGE OF SAID MATERIALS, MIXING SAID MATEIRALS AND STARTING THE REACTION THEREOF IN SUBSTANTIALLY ALL PARTS THEREOF AT SUBSTANTIALLY THE SAME MOMENT THEREAFTER, POURING THE CHARGE OF SAID MATERIALS ONTO THE FLOOR OF SAID MOLD INA TAPERED POUR PATTERN WHEREIN THE WEIGHT CONCENTRATION OF SAID MATERIALS IS SLIGHTLY GREATER AT ONE END OF SAID MOLD, CLOSING SAID MOLD, EXPANDING SAID MATERIALS INTO A FOAM WHILE EXPELLING THE AIR FROM THE MOLD GAS RELEASED BY SAID FOAM PROGRESSIVELY ALONG THE MOLD SURFACE TOWARD ONE END OF THE MOLD, COMPLETING THE CURE OF SAID FOAM, AND REMOVING THE RESULTANT MOLDED ARTICLE.
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) | 1966-11-18 | 1967-05-20 | 1967-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-18 | 1971-05-20 | 1971-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-18 | 1975-05-20 | 1975-11-19 | $7700.00 | Window Closed / Lapsed |