Patent US3273873A successfully refreshed from Google Patents.
US3273873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for dry heat pre-expansion of expandable polystyrene and like products
Assignee: Individual
•
Filing: 1962-11-13
•
Granted: 1966-09-20
•
Expires: 1982-11-13
Abstract
No abstract record available.
Inventors
- 👤 Ivan J Stanchel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:00
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/3461; Y; Y10; Y10S; Y10S366/00; Y10S366/604
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
APPARATUS FOR EXPANDING POLYSTYRENE BEADS COMPRISNG: A HOUSNGG IN WHICH SAID BEADS ARE EXPANDED, SAID HOUSING HAVING AN ENCOMPASSING SIDEWALL, A CLOSED TTOP AND A CLOSED BOTTOM WALL; AN OUTLET PORT IN SAID HOUSING ADJACENT ITS TOP THROUGH WHICH THE EXPANDED BEADS ARE DISCHARGED; AN INLET PORT IN SAID BOTTOM WALL THROUGH WHICH UNEXPANDED BEADS ENTER SAID HOUSING; AIR DUSTRIBUTION MEANS LOCATED IN SAID HOUSING FOR ESTABLISHING A DRY-HEAT ZONE THEREIN AND FOR SUSPENDING SAID BEADS WITHIN SAID HOUSING; AN AGITATOR ROTATABLY MOUNTED IN SAID HOUSING SUPERJACENT SAID MATERIAL INLET PORT FOR MOVING SAID BEADS IN SUSPENDED CONDITION THROUGH SAID DRYHEAT ZONE TO SAID OUTLET PORT; MEANS FOR ROTATING SAID AGITATOR, SAID AIR DISTRIBUTION MEANS CONNECTED TO SAID AGITATOR ADJACENT THE LOWER END THEREOF FOR ROTATION THEREWITH THE DIRECTING PRE-HEATED MOISTURE FREE AIR INTO UN-
Claim 2
Dependent Claim
135 words
APPARATUS FOR EXPANDING POLYSTYRENE BEADS COMPRISNG: A HOUSNGG IN WHICH SAID BEADS ARE EXPANDED, SAID HOUSING HAVING AN ENCOMPASSING SIDEWALL, A CLOSED TTOP AND A CLOSED BOTTOM WALL; AN OUTLET PORT IN SAID HOUSING ADJACENT ITS TOP THROUGH WHICH THE EXPANDED BEADS ARE DISCHARGED; AN INLET PORT IN SAID BOTTOM WALL THROUGH WHICH UNEXPANDED BEADS ENTER SAID HOUSING; AIR DUSTRIBUTION MEANS LOCATED IN SAID HOUSING FOR ESTABLISHING A DRY-HEAT ZONE THEREIN AND FOR SUSPENDING SAID BEADS WITHIN SAID HOUSING; AN AGITATOR ROTATABLY MOUNTED IN SAID HOUSING SUPERJACENT SAID MATERIAL INLET PORT FOR MOVING SAID BEADS IN SUSPENDED CONDITION THROUGH SAID DRYHEAT ZONE TO SAID OUTLET PORT; MEANS FOR ROTATING SAID AGITATOR, SAID AIR DISTRIBUTION MEANS CONNECTED TO SAID AGITATOR ADJACENT THE LOWER END THEREOF FOR ROTATION THEREWITH THE DIRECTING PRE-HEATED MOISTURE FREE AIR INTO UN-
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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) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |