US3214891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making alcoholformaldehyde product
Assignee: Gulf Oil Corp
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Filing: 1961-09-15
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Granted: 1965-11-02
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Expires: 1981-09-15
Abstract
No abstract record available.
Inventors
- 👤 Dean L Kloepper
- 👤 Lawrence G Stevenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:51
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/78; C07C45/783; C07C29/00; C07C29/74; C07C45/81
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
83 words
A METHOD OF PRODUCING A C2 TO C4 ALKANOL-FORMALDEHYDE PRODUCT HAVING LOW MOISTURE CONTENT COMPRISING PARTIALLY CONDENSING A GASEOUS FORMALDEHYDE STREAM CONTAINING WATER AND METHANOL TO FORM A WATER-ENRICHED CONDENSATE AND A FORMALDEHYDE-ENRICHED VAPOR CONTAINING METHANOL, SEPARATING SAID WATER-ENRICHED CONDENSATE FROM SAID FORMALDEHYDE-ENRICHED VAPOR, FORMING SAID C2 TO C4 ALKANOL-FORMALDEHYDE PRODUCT BY ABSORBING SAID FORMALDEHYDE AND METHANOL IN SAID FORMALDEYHDE-ENRICHED VAPOR IN C2 TO C4 ALKANOL, AND REMOVING METHANOL IN EXCESS OF THAT CONCENTRATION DESIRED IN SAID FINAL C2 TO C4 ALKANOL-FORMALDEHYDE PRODUCT.
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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) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |