US2673219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of pimelic acid
Assignee: Distillers Co Yeast Ltd
•
Filing: 1950-11-13
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Granted: 1954-03-23
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Expires: 1970-11-13
Abstract
No abstract record available.
Inventors
- 👤 Major Frederick William
- 👤 Stanley Herbert Muggleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:57
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/295
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A PROCESS FOR THE MANUFACTURE OF PIMELIC ACID WHICH COMPRISES CONTACTING IN THE LIQUID PHASE A COMPOUND SELECTED FROM THE GROUP CONSISTING OF DELTA3-TETRAHYDROBENZALDEHYDE, DELTA3TETRAHYDROBENZALDEHYDE TRIMER AND THE ALKALINE CONDENSATION PRODUCTS OF DELTA3-TETRAHYDROBENZALDEHYDE, WITH AN AQUEOUS SOLUTION OF AN ALKALI METAL HYDROXIDE, THE REACTION MIXTURE BEING BROUGHT TO A TEMPERATURE IN THE RANGE 250*400* C., AND THEREAFTER SEPARATING THE PIMELIC ACID FROM THE REACTION MIXTURE.
Claim 2
Dependent Claim
65 words
A PROCESS FOR THE MANUFACTURE OF PIMELIC ACID WHICH COMPRISES CONTACTING IN THE LIQUID PHASE A COMPOUND SELECTED FROM THE GROUP CONSISTING OF DELTA3-TETRAHYDROBENZALDEHYDE, DELTA3TETRAHYDROBENZALDEHYDE TRIMER AND THE ALKALINE CONDENSATION PRODUCTS OF DELTA3-TETRAHYDROBENZALDEHYDE, WITH AN AQUEOUS SOLUTION OF AN ALKALI METAL HYDROXIDE, THE REACTION MIXTURE BEING BROUGHT TO A TEMPERATURE IN THE RANGE 250*400* C., AND THEREAFTER SEPARATING THE PIMELIC ACID FROM THE REACTION MIXTURE.
References Cited (Backward Citations)
US2454047A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |