Patent US3274643A successfully refreshed from Google Patents.
US3274643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for determining the expansive pressure of molded polystyrene beads
Assignee: Dyfoam Corp
•
Filing: 1964-07-20
•
Granted: 1966-09-27
•
Expires: 1984-07-20
Abstract
No abstract record available.
Inventors
- 👤 Berton R Oxel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:26
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/20; B29C44/206
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
IN AN APPARATUS FOR THE MOLDING OF PLASTIC FROM THE EXPANSION OF POLYSTYRENE BEADS, THE COMBINATION COMPRISING A PAIR OF MOVING ENDLESS BANDS BETWEEN WHICH SAID BEADS ARE EXPANDED AND MOLDED, SAID BANDS BEING SUPPORTED AND MOTIVATED BY A PLURALITY OF SPACED ROLLERS; A STREAM CHEST POSITIONED ALONG THE PATH OF SAID BANDS AND THROUGH WHICH SAID BANDS AND SAID BEADS TRAVEL TO CAUSE THE EXPANSION OF SAID BEADS; THE IMPROVEMENT COMPRISING THE REPLACING OF ONE OF SAID SPACED SUPPORTING AND MOTIVATING ROLLERS IMMEDIATELY ADJACENT THE DISCHARGE END OF SAID STREAM CABINET BY A MOTION INDICATING MEANS, SAID MEANS BEING IN DIRECT CONTACT WITH SAID BAND SO AS TO BE RESPONSIVE TO, AND TO BE ABLE TO TRANSMIT, ANY RELATIVE MOVEMENT OF SAID BANDS CAUSED BY THE EXPANSION OF SAID BEADS.
Claim 2
Dependent Claim
131 words
IN AN APPARATUS FOR THE MOLDING OF PLASTIC FROM THE EXPANSION OF POLYSTYRENE BEADS, THE COMBINATION COMPRISING A PAIR OF MOVING ENDLESS BANDS BETWEEN WHICH SAID BEADS ARE EXPANDED AND MOLDED, SAID BANDS BEING SUPPORTED AND MOTIVATED BY A PLURALITY OF SPACED ROLLERS; A STREAM CHEST POSITIONED ALONG THE PATH OF SAID BANDS AND THROUGH WHICH SAID BANDS AND SAID BEADS TRAVEL TO CAUSE THE EXPANSION OF SAID BEADS; THE IMPROVEMENT COMPRISING THE REPLACING OF ONE OF SAID SPACED SUPPORTING AND MOTIVATING ROLLERS IMMEDIATELY ADJACENT THE DISCHARGE END OF SAID STREAM CABINET BY A MOTION INDICATING MEANS, SAID MEANS BEING IN DIRECT CONTACT WITH SAID BAND SO AS TO BE RESPONSIVE TO, AND TO BE ABLE TO TRANSMIT, ANY RELATIVE MOVEMENT OF SAID BANDS CAUSED BY THE EXPANSION OF SAID BEADS.
References Cited (Backward Citations)
US2423914A
Cited
US2566854A
Cited
US2954589A
Cited
US3042973A
Cited
US2929793A
Cited
US2998501A
Cited
US3025568A
Cited
US3065500A
Cited
US3015851A
Cited
US3079661A
Cited
US3131426A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |