US3030623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making blown rubber
Assignee: Uniroyal Inc
•
Filing: 1957-11-21
•
Granted: 1962-04-17
•
Expires: 1977-11-21
Abstract
No abstract record available.
Inventors
- 👤 Henry J Lehti
- 👤 William A Merck
- 👤 Thomas J Rhodes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:47
CPC Classifications
B; B29; B29C; B29C67/00; B29C67/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
A METHOD OF CONTINUOUSLY PRODUCING BLOWN RUBBER IN LONG UNINTERRUPTED LENGHTS OF DEFINITE CROSS-SECTIONAL SHAPE, COMPRISING IN COMBINATION THE STEPS OF EXTRUDING A VULCANIZABLE RUBBER SPONGE STOCK UNDER PRESSURE THROUGH A RESTRICTED DIE, AND THEREAFTER THROUH A GREATLY ELONGATED HEATED TUBE HAVING A LARGER CROSS-SECTION CORRESPONDING TO THE SIZE AND SHAPE OF THE FINALLY DESIRED PRODUCT OT SUBSTANTIALLY FILL SAID ELONGATED TUBE CIRCUMFERENTIALLY, THE RATIO OF THE CROSS-SECTIONAL AREA OF THE ELONGATED DIE TO THAT OF THE RESTRICTED DIE BEING AT LEAST AS GREAT AS THE RATIO OF THE VOLUME OF THE STOCK AFTER BLOWING TO THE VOLUME BEFORE BLOWING, INTRODUCING A STRING TO THE INTERIOR OF THE STOCK WITHIN THE RESTRICTED DIE AT A SPEED SUBSTANTIALLY EQUAL TO THE SPEED THE STRING EMERGES FROM THE SAID ELONGATED TUBE, WHEREBY THE SPEED OF THE STRING IN THE FOREPART OF THE ELONGATED TUBE WILL BE LESS THAN THE SPEED OF THE STRING IN THE RESTRICTED DIE AND WHEREBY THE STRING WILL FOLD AT A PLUALITY OF POINTS
Claim 2
Independent Claim
166 words
A METHOD OF CONTINUOUSLY PRODUCING BLOWN RUBBER IN LONG UNINTERRUPTED LENGHTS OF DEFINITE CROSS-SECTIONAL SHAPE, COMPRISING IN COMBINATION THE STEPS OF EXTRUDING A VULCANIZABLE RUBBER SPONGE STOCK UNDER PRESSURE THROUGH A RESTRICTED DIE, AND THEREAFTER THROUH A GREATLY ELONGATED HEATED TUBE HAVING A LARGER CROSS-SECTION CORRESPONDING TO THE SIZE AND SHAPE OF THE FINALLY DESIRED PRODUCT OT SUBSTANTIALLY FILL SAID ELONGATED TUBE CIRCUMFERENTIALLY, THE RATIO OF THE CROSS-SECTIONAL AREA OF THE ELONGATED DIE TO THAT OF THE RESTRICTED DIE BEING AT LEAST AS GREAT AS THE RATIO OF THE VOLUME OF THE STOCK AFTER BLOWING TO THE VOLUME BEFORE BLOWING, INTRODUCING A STRING TO THE INTERIOR OF THE STOCK WITHIN THE RESTRICTED DIE AT A SPEED SUBSTANTIALLY EQUAL TO THE SPEED THE STRING EMERGES FROM THE SAID ELONGATED TUBE, WHEREBY THE SPEED OF THE STRING IN THE FOREPART OF THE ELONGATED TUBE WILL BE LESS THAN THE SPEED OF THE STRING IN THE RESTRICTED DIE AND WHEREBY THE STRING WILL FOLD AT A PLUALITY OF POINTS
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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) | 1965-04-16 | 1965-10-16 | 1966-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-16 | 1969-10-16 | 1970-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-16 | 1973-10-16 | 1974-04-17 | $7700.00 | Window Closed / Lapsed |