US2512950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of polyoxymethylene ethers
Assignee: EIDP Inc
•
Filing: 1944-12-30
•
Granted: 1950-06-27
•
Expires: 1964-12-30
Abstract
No abstract record available.
Inventors
- 👤 Londergan Thomas Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:44
CPC Classifications
C; C07; C07C; C07C43/00; C07C43/02; C07C43/03; C07C43/04; C07C43/13; C07C43/135; C08; C08G; C08G2/00; C08G2/30; C08G2/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
THE PROCESS FOR THE PRODUCTION OF POLYOXYMETHYLENE ETHERS WHICH COMPRISES FORMING A SUBSTANTIALLY NON-AQUEOUS SOLUTION COMRPRISING 60 TO 90 PARTS BY WEIGHT OF A COMPOUND TAKEN FROM THE GROUP CONSISTING OF FORMALDEHYDE AND FORMALDEHYDE POLYMERS OF THE POLYOXYMETHYLENE TYPE DISSOLVED IN 40 TO 10 PARTS BY WEIGHT OF A SATURATED ALIPHATIC ALCOHOL CONTAINIG 1 TO 3 HYDROXY RADICALS, AND ADDING TO SAID SOLUTION, AS A CATALYST, CONCENTRATED SULFURIC ACID.
Claim 2
Dependent Claim
69 words
THE PROCESS FOR THE PRODUCTION OF POLYOXYMETHYLENE ETHERS WHICH COMPRISES FORMING A SUBSTANTIALLY NON-AQUEOUS SOLUTION COMRPRISING 60 TO 90 PARTS BY WEIGHT OF A COMPOUND TAKEN FROM THE GROUP CONSISTING OF FORMALDEHYDE AND FORMALDEHYDE POLYMERS OF THE POLYOXYMETHYLENE TYPE DISSOLVED IN 40 TO 10 PARTS BY WEIGHT OF A SATURATED ALIPHATIC ALCOHOL CONTAINIG 1 TO 3 HYDROXY RADICALS, AND ADDING TO SAID SOLUTION, AS A CATALYST, CONCENTRATED SULFURIC ACID.
References Cited (Backward Citations)
US2331367A
Cited
US2183317A
Cited
US2307937A
Cited
US2233428A
Cited
US2304431A
Cited
US2350350A
Cited
US2333927A
Cited
US2449469A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-26 | 1953-12-26 | 1954-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-26 | 1957-12-26 | 1958-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-26 | 1961-12-26 | 1962-06-27 | $7700.00 | Window Closed / Lapsed |