US3274148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fracture support agents made by cyclizing and curing rubbery pelletized butadiene copolymers
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1964-05-13
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Granted: 1966-09-20
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Expires: 1984-05-13
Abstract
No abstract record available.
Inventors
- 👤 William J Sparks
- 👤 Jr Leon S Minckler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:08
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A CONTINUOUS METHOD FOR PREPARING HARD PELLETIZED FRACTURE SUPPORTS WHICH COMPRISES: CONTINUOUSLY PASSING A POLYMER OF CONJUGATED DIOLEFIN THROUGH A PLURALITY OF TREATING ZONES COMPRISING THE FOLLOWING SUCCESSIVE STEPS: (A) PELLETIZING SAID POLYMER, (B) EFFECTIVE PARTIAL CURE OF SAID PELLETIZED POLYMER UNDER PRESSURE IN THE PRESENCE OF A CURING AGENT AT A TEMPERATURE BETWEEN 200 AND 400*F. AND A PRESSURE BETWEEN 29 AND 1000 P.S.I.G. FOR A PERIOD OF TIME BETWEEN ONE MINUTE AND 17 HOURS, (C) EFFECTING CYCLIZATION OF SAID PARTIALLY CURED PELLETS BY PASSING SAID PARTIALLY CURED PELLETS THROUGH A HEATING ZONE UNDER CONDITIONS OF SUBSTANTIALLY PLUG FLOW AT A TEMPERATURE BETWEEN 300 AND 650*F. AND A PRESSURE BETWEEN ATMOSPHERIC AND 1000 P.S.I.G. FOR A PERIDO OF TIME BETWEEN 5 MINUTES AND 24 HOURS.
Claim 2
Dependent Claim
126 words
A CONTINUOUS METHOD FOR PREPARING HARD PELLETIZED FRACTURE SUPPORTS WHICH COMPRISES: CONTINUOUSLY PASSING A POLYMER OF CONJUGATED DIOLEFIN THROUGH A PLURALITY OF TREATING ZONES COMPRISING THE FOLLOWING SUCCESSIVE STEPS: (A) PELLETIZING SAID POLYMER, (B) EFFECTIVE PARTIAL CURE OF SAID PELLETIZED POLYMER UNDER PRESSURE IN THE PRESENCE OF A CURING AGENT AT A TEMPERATURE BETWEEN 200 AND 400*F. AND A PRESSURE BETWEEN 29 AND 1000 P.S.I.G. FOR A PERIOD OF TIME BETWEEN ONE MINUTE AND 17 HOURS, (C) EFFECTING CYCLIZATION OF SAID PARTIALLY CURED PELLETS BY PASSING SAID PARTIALLY CURED PELLETS THROUGH A HEATING ZONE UNDER CONDITIONS OF SUBSTANTIALLY PLUG FLOW AT A TEMPERATURE BETWEEN 300 AND 650*F. AND A PRESSURE BETWEEN ATMOSPHERIC AND 1000 P.S.I.G. FOR A PERIDO OF TIME BETWEEN 5 MINUTES AND 24 HOURS.
References Cited (Backward Citations)
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 |