US2610166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of equipment
Assignee: Shell Development Co
•
Filing: 1951-04-02
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Granted: 1952-09-09
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Expires: 1971-04-02
Abstract
No abstract record available.
Inventors
- 👤 Harvey L Parry
- 👤 Donald C Waldman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:17
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/002; C08F2/004
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
THE METHOD OF RECOVERING POLYMERIC DEPOSITS FORMED IN EQUIPMENT DURING THE PROCESSING OF ALPHA, BETA-UNSATURATED ALIPHATIC ALDEHYDES AT ELEVATED TEMPERATURES THEREIN, WHICH COMPRISES CONTACTING SAID POLYMERIC DEPOSITS WITHIN SAID EQUIPMENT WITH A NORMALLY LIQUID SOLVENT CONSISTING ESSENTIALLY OF AT LEAST ONE HYDROXY COMPOUND OF THE CLASS CONSISTING OF THE GLYCOLS AND HALOHYDRINS AT A TEMPERATURE OF FROM ABOUT 50* C. TO THAT OF THE BOILING TEMPERATURE OF SAID SOLVENT, THEREBY DISSOLVING AT LEAST A SUBSTANTIAL PART OF SAID POLYMERIC DEPOSIT IN SAID SOLVENT, AND WITHDRAWING RESULTING SOLUTION COMPRISING SAID SOLVENT AND SAID POLYMERIC DEPOSIT FROM SAID EQUIPMENT.
Claim 2
Independent Claim
97 words
THE METHOD OF RECOVERING POLYMERIC DEPOSITS FORMED IN EQUIPMENT DURING THE PROCESSING OF ALPHA, BETA-UNSATURATED ALIPHATIC ALDEHYDES AT ELEVATED TEMPERATURES THEREIN, WHICH COMPRISES CONTACTING SAID POLYMERIC DEPOSITS WITHIN SAID EQUIPMENT WITH A NORMALLY LIQUID SOLVENT CONSISTING ESSENTIALLY OF AT LEAST ONE HYDROXY COMPOUND OF THE CLASS CONSISTING OF THE GLYCOLS AND HALOHYDRINS AT A TEMPERATURE OF FROM ABOUT 50* C. TO THAT OF THE BOILING TEMPERATURE OF SAID SOLVENT, THEREBY DISSOLVING AT LEAST A SUBSTANTIAL PART OF SAID POLYMERIC DEPOSIT IN SAID SOLVENT, AND WITHDRAWING RESULTING SOLUTION COMPRISING SAID SOLVENT AND SAID POLYMERIC DEPOSIT FROM SAID EQUIPMENT.
References Cited (Backward Citations)
US2071419A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-09 | 1956-03-10 | 1956-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-09 | 1960-03-10 | 1960-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-09 | 1964-03-10 | 1964-09-09 | $7700.00 | Window Closed / Lapsed |