US3086995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of formaldehyde
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1959-12-30
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Granted: 1963-04-23
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Expires: 1979-12-30
Abstract
No abstract record available.
Inventors
- 👤 Carl E Heath
- 👤 Bartok William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:59
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A PROCESS FOR PRODUCING FORMALDEHYDE WHICH COMPRISES CONTACTING ETHANE AND MOLECULAR OXYGEN IN AN OXYGEN TO ETHANE MOLE RATIO OF ABOUT 0.2 TO 1 WITH 0.5 TO 2.5 WEIGHT PERCENT OZONE BASED ON ETHANE IN A REACTION ZONE HAVING A SURFACE TO VOLUME RATIO OF ABOUT 2 TO 5.8 CM.-1 AT A TEMPERATURE IN THE RANGE OF 400-800*F., SAID SURFACE BEING SELECTED FROM THE GROUP CONSISTING OF OXIDES OF LEAD, BORON AND MANGANESE, AND WITHDRAWING REACTION PRODUCT FROM THE REACTION ZONE AND RECOVERING FORMALDEHYDE THEREFROM.
Claim 2
Dependent Claim
85 words
A PROCESS FOR PRODUCING FORMALDEHYDE WHICH COMPRISES CONTACTING ETHANE AND MOLECULAR OXYGEN IN AN OXYGEN TO ETHANE MOLE RATIO OF ABOUT 0.2 TO 1 WITH 0.5 TO 2.5 WEIGHT PERCENT OZONE BASED ON ETHANE IN A REACTION ZONE HAVING A SURFACE TO VOLUME RATIO OF ABOUT 2 TO 5.8 CM.-1 AT A TEMPERATURE IN THE RANGE OF 400-800*F., SAID SURFACE BEING SELECTED FROM THE GROUP CONSISTING OF OXIDES OF LEAD, BORON AND MANGANESE, AND WITHDRAWING REACTION PRODUCT FROM THE REACTION ZONE AND RECOVERING FORMALDEHYDE THEREFROM.
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) | 1966-04-22 | 1966-10-22 | 1967-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-22 | 1970-10-22 | 1971-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-22 | 1974-10-22 | 1975-04-23 | $7700.00 | Window Closed / Lapsed |