Patent US3122785A successfully refreshed from Google Patents.
US3122785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making cellular plastics
Assignee: Bayer AG
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Filing: 1957-05-14
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Granted: 1964-03-03
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Expires: 1977-05-14
Abstract
No abstract record available.
Inventors
- 👤 Weinbrenner Erwin
- 👤 Hoppe Peter
- 👤 Breer Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:11
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/74; B29B7/7404
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
AN APPARATUS COMPRISING A CHAMBER, A PISTON IN SAID CHAMBER OCCUPYING ONLY A PORTION THEREOF, MEANS FOR MOVING THE PISTON FROM ONE END OF THE CHAMBER TOWARDS THE OPPOSITE END THEREOF, SAID PISTON HAVING A DIAMETER SUBSTANTIALLY EQUAL TO THE INTERNAL DIAMETER OF THE CHAMBER AND HAVING ONE END OPPOSITE THE FIRST-SAID END OF THE CHAMBER, AN ANNULAR GROOVE IN SAID PISTION, A PLURALITY OF BORES EXTENDING FROM SAID ANNULAR GROOVE AND COMMUNICATING WITH THE UNOCCUPIED SPACE IN SAID CHAMBER, MEANS FOR INTRODUCING LIQUIDS INTO SAID GROOVE AND FORCING THEM THROUGH SAID BORES INTO THE UNOCCUPIED SPACE IN THE CHAMBER, A TEMPERATURE MEASURING MEANS IN SAID UNOCCUPIED SPACE OF THE CHAMBER, MEANS FOR ACTUATING SAID PISTION ACTUATION OF THE PISTON BEING INTIATED BY SAID TEMPERATURE MEASURING MEANS AND MEANS THROUGH WHICH SAID LIQUID IF FORCED FROM SAID CHAMBER AS SAID PISTON MOVES FROM ONE END TOWARDS THE OPPOSITE END.
Claim 2
Independent Claim
149 words
AN APPARATUS COMPRISING A CHAMBER, A PISTON IN SAID CHAMBER OCCUPYING ONLY A PORTION THEREOF, MEANS FOR MOVING THE PISTON FROM ONE END OF THE CHAMBER TOWARDS THE OPPOSITE END THEREOF, SAID PISTON HAVING A DIAMETER SUBSTANTIALLY EQUAL TO THE INTERNAL DIAMETER OF THE CHAMBER AND HAVING ONE END OPPOSITE THE FIRST-SAID END OF THE CHAMBER, AN ANNULAR GROOVE IN SAID PISTION, A PLURALITY OF BORES EXTENDING FROM SAID ANNULAR GROOVE AND COMMUNICATING WITH THE UNOCCUPIED SPACE IN SAID CHAMBER, MEANS FOR INTRODUCING LIQUIDS INTO SAID GROOVE AND FORCING THEM THROUGH SAID BORES INTO THE UNOCCUPIED SPACE IN THE CHAMBER, A TEMPERATURE MEASURING MEANS IN SAID UNOCCUPIED SPACE OF THE CHAMBER, MEANS FOR ACTUATING SAID PISTION ACTUATION OF THE PISTON BEING INTIATED BY SAID TEMPERATURE MEASURING MEANS AND MEANS THROUGH WHICH SAID LIQUID IF FORCED FROM SAID CHAMBER AS SAID PISTON MOVES FROM ONE END TOWARDS THE OPPOSITE END.
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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) | 1967-03-03 | 1967-09-02 | 1968-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-03 | 1971-09-02 | 1972-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-03 | 1975-09-02 | 1976-03-03 | $7700.00 | Window Closed / Lapsed |