US3290403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing diene hydrocarbons from 1, 3 dioxanes
Assignee: VSESOUZNY N ISSELDOVATELSKY I
•
Filing: 1964-04-23
•
Granted: 1966-12-06
•
Expires: 1984-04-23
Abstract
No abstract record available.
Inventors
- 👤 Nemtsov Mark Semenovich
- 👤 Kachalova Revekka Vulfovna
- 👤 Romanova Nadezhda Vasiljevna
- 👤 Kalinicheva Nadezhda Andreevna
- 👤 Shenderovich Fridr Shmerkovich
- 👤 Mandelshtam Elena Jakovlevna
- 👤 Arkharov Sergei Nickolaevich
- 👤 Zlatkin Vladimir Nazarovich
- 👤 Grinshpun Valery Jakovlevich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:55
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/20; C07C1/247; C07C2527/00; C07C2527/14; C07C2527/16; C07C2527/167; C07C2527/173; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A PROCESS OF PREPARING DIENE HYDROCARBONS FROM 1,3-DIOXANES WHICH COMPRISES SIMULTANEOUSLY PASSING DIOXANE VAPOR AND SUPERHEATED STEAM, CONTAINING 0.0020.060 PERCENT OF PHOSPHORIC ACID, THROUGH PHOSPHATES HEATED TO 300-400*C. AND SELECTED FROM THE GROUP CONSISTNG OF CALCUIUM AND CADMIUM PHOSPHATES AND MIXTURES THEREOF, WHEREIN THE PHOSPHORIC ACID ON INTERACTION WITH SAID PHOSPHATES YIELDS A CATALYTICALLY ACTIVE ACID PHASE.
Claim 2
Dependent Claim
57 words
A PROCESS OF PREPARING DIENE HYDROCARBONS FROM 1,3-DIOXANES WHICH COMPRISES SIMULTANEOUSLY PASSING DIOXANE VAPOR AND SUPERHEATED STEAM, CONTAINING 0.0020.060 PERCENT OF PHOSPHORIC ACID, THROUGH PHOSPHATES HEATED TO 300-400*C. AND SELECTED FROM THE GROUP CONSISTNG OF CALCUIUM AND CADMIUM PHOSPHATES AND MIXTURES THEREOF, WHEREIN THE PHOSPHORIC ACID ON INTERACTION WITH SAID PHOSPHATES YIELDS A CATALYTICALLY ACTIVE ACID PHASE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |