US3225124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of molding a foamed plastic covering on an article
Assignee: OI Glass Inc
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Filing: 1961-06-16
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Granted: 1965-12-21
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Expires: 1981-06-16
Abstract
No abstract record available.
Inventors
- 👤 Robert T Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:24
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/02; B29C44/04; B29C44/0461
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
IN A METHOD OF MOLDING IN SITU ABOUT AN ARTICLE A COVERING HAVING WALLS OF VARIABLE DENSITY FROM A CHARGE OF HEAT EXPANSIBLE THERMOPLASTIC BEADS, THE STEPS COMPRISING PARTIALLY FILLING A MOLD CAVITY WITH SAID CHARGE, CENTRALLY POSITIONING SAID ARTICLE IN THE MOLD CAVITY ON SAID CHARGE, INTRODUCING ADDITIONAL HEAT EXPANSIBLE THERMOPLASTIC BEADS BUT NOT AS TO FILL THE MOLD CAVITY COMPLETELY, CLOSING THE MOLD CAVITY, THEREAFTER APPLYING HEAT TO SAID CHARGE FOR THE PURPOSE OF EXPANDING AND SURFACE FUSING THE BEADS, COOLING THE RESULTING CHARGE, AND REMOVING THE ARTICLE WITH THE ENVELOPING COVER FROM THE MOLD WHEREBY THAT FOAMED PORTION CORRESPONDING TO SAID FIRST CHARGE IS MORE DENSE THAN THE REMAINING FOAMED PORTION.
Claim 2
Dependent Claim
114 words
IN A METHOD OF MOLDING IN SITU ABOUT AN ARTICLE A COVERING HAVING WALLS OF VARIABLE DENSITY FROM A CHARGE OF HEAT EXPANSIBLE THERMOPLASTIC BEADS, THE STEPS COMPRISING PARTIALLY FILLING A MOLD CAVITY WITH SAID CHARGE, CENTRALLY POSITIONING SAID ARTICLE IN THE MOLD CAVITY ON SAID CHARGE, INTRODUCING ADDITIONAL HEAT EXPANSIBLE THERMOPLASTIC BEADS BUT NOT AS TO FILL THE MOLD CAVITY COMPLETELY, CLOSING THE MOLD CAVITY, THEREAFTER APPLYING HEAT TO SAID CHARGE FOR THE PURPOSE OF EXPANDING AND SURFACE FUSING THE BEADS, COOLING THE RESULTING CHARGE, AND REMOVING THE ARTICLE WITH THE ENVELOPING COVER FROM THE MOLD WHEREBY THAT FOAMED PORTION CORRESPONDING TO SAID FIRST CHARGE IS MORE DENSE THAN THE REMAINING FOAMED PORTION.
References Cited (Backward Citations)
US2787809A
Cited
US2983963A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |