US2970089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Devolatilizing polymeric compositions
Assignee: Dow Chemical Co
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Filing: 1957-01-09
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Granted: 1961-01-31
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Expires: 1977-01-09
Abstract
No abstract record available.
Inventors
- 👤 Wilson W Hunt
- 👤 Samuel G Ludington
- 👤 James L Amos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:49
CPC Classifications
B; B01; B01D; B01D19/00; C; C08; C08F; C08F6/00; C08F6/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
THE METHOD FOR DEVOLATIZING AN UNDEVOLATILIZED LIQUID POLYMER COMPOSITION THAT CONTAINS UNPOLYMERIZED MONOMER AND FUGACIOUS LOW MOLECULAR WEIGHT POLYMERS AMOUNG ITS VOLATILE CONSTITUENTS WHICH COMPRISES FEEDING THE UNDEVOLATILIZED POLYMER COMPOSITION AT A DEVOLTILIZING TEMPERATURE INTO AN ENCLOSED DEVOLATILIZING CHAMBER HAVING AN OVERHEAD CONDENSING SURFACE THEREIN, MAINTAINING THE CONDENSING SURFACE IN SAID CHAMBER AT A TEMPERATURE THAT, UNDER TGHE EFFECTIVE PRESSURE THAT IS PRESENT IN SAID CHAMBER, IS GREATER THAN THE CONDENSING TEMPERATURE OF THE MONOMER IN THE VOLATILE CONSTITUENTS ESCAPING FROM THE POLYMERIC COMPOSITION BEING DEVOLATILIZED BUT NOT IN EXCESS OF A CONDENSING TEMPERATURE FOR THE FUGACIOUS LOW MOLECULAR WEIGHT POLYMERS IN SAID ESCAPING VOLATILE CONSTITUENTS UNDER SAID PRESSURE IN SAID CHAMBER, WITHDRAWING SUBSTANTIALLY PURE MONOMER VAPORS FROM SAID CHAMBER, WITHDRAWING FROM SAID CONDENSING SURFACE IN SAIC CHAMBER, AS A LIQUID, THE LOW MOLECULAR WEIGHT POLUMERS THAT HAVE BEEN CONDENSATED FROM SAID VOLATILE CONSTITUENTS, AND WITHDRAWING DEVOLATILIZED POLYMER PRODUCT FROM SAID CHAMBER.
Claim 2
Independent Claim
152 words
THE METHOD FOR DEVOLATIZING AN UNDEVOLATILIZED LIQUID POLYMER COMPOSITION THAT CONTAINS UNPOLYMERIZED MONOMER AND FUGACIOUS LOW MOLECULAR WEIGHT POLYMERS AMOUNG ITS VOLATILE CONSTITUENTS WHICH COMPRISES FEEDING THE UNDEVOLATILIZED POLYMER COMPOSITION AT A DEVOLTILIZING TEMPERATURE INTO AN ENCLOSED DEVOLATILIZING CHAMBER HAVING AN OVERHEAD CONDENSING SURFACE THEREIN, MAINTAINING THE CONDENSING SURFACE IN SAID CHAMBER AT A TEMPERATURE THAT, UNDER TGHE EFFECTIVE PRESSURE THAT IS PRESENT IN SAID CHAMBER, IS GREATER THAN THE CONDENSING TEMPERATURE OF THE MONOMER IN THE VOLATILE CONSTITUENTS ESCAPING FROM THE POLYMERIC COMPOSITION BEING DEVOLATILIZED BUT NOT IN EXCESS OF A CONDENSING TEMPERATURE FOR THE FUGACIOUS LOW MOLECULAR WEIGHT POLYMERS IN SAID ESCAPING VOLATILE CONSTITUENTS UNDER SAID PRESSURE IN SAID CHAMBER, WITHDRAWING SUBSTANTIALLY PURE MONOMER VAPORS FROM SAID CHAMBER, WITHDRAWING FROM SAID CONDENSING SURFACE IN SAIC CHAMBER, AS A LIQUID, THE LOW MOLECULAR WEIGHT POLUMERS THAT HAVE BEEN CONDENSATED FROM SAID VOLATILE CONSTITUENTS, AND WITHDRAWING DEVOLATILIZED POLYMER PRODUCT FROM SAID CHAMBER.
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) | 1964-01-31 | 1964-08-01 | 1965-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-31 | 1968-08-01 | 1969-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-31 | 1972-08-01 | 1973-01-31 | $7700.00 | Window Closed / Lapsed |