US2777871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bis nu-substituted carbamic acid esters of polyhydric alcohols and process
Assignee: Columbia Southern Chemical Corp
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Filing: 1952-08-05
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Granted: 1957-01-15
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Expires: 1972-08-05
Abstract
No abstract record available.
Inventors
- 👤 Strain Franklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:13
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/205; Y; Y10; Y10T; Y10T74/00; Y10T74/22
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
72 words
A METHOD OF PREPARING A CARBAMATE WHICH COMPRISES CONTACTING A PRIMARY MONOAMINE WITH A BIS-CHLOROFORMATE OF A POLYGLYCOL AND AN ACID NEUTRALIZING AGENT; THE PROPORTIONS OF AMINE AND ACID NEUTRALIZING AGENTS BEING TWO EQUIVALENTS, RESPECTIVELY, PER MOLE OF CHLOROFORMATE, AND RECOVERING FROM THE RESULTANT REACTION MIXTURE AN ESTER AMIDE OF (A) THE AMINE AND (B) A BIS ACID CARBONATE OF THE POLYGLYCOL, WHEREIN BOTH ACID GROUPS OF (B) ARE AMIDATED WITH (A).
Claim 2
Independent Claim
72 words
A METHOD OF PREPARING A CARBAMATE WHICH COMPRISES CONTACTING A PRIMARY MONOAMINE WITH A BIS-CHLOROFORMATE OF A POLYGLYCOL AND AN ACID NEUTRALIZING AGENT; THE PROPORTIONS OF AMINE AND ACID NEUTRALIZING AGENTS BEING TWO EQUIVALENTS, RESPECTIVELY, PER MOLE OF CHLOROFORMATE, AND RECOVERING FROM THE RESULTANT REACTION MIXTURE AN ESTER AMIDE OF (A) THE AMINE AND (B) A BIS ACID CARBONATE OF THE POLYGLYCOL, WHEREIN BOTH ACID GROUPS OF (B) ARE AMIDATED WITH (A).
Claim 3
Dependent Claim
5 words
DIETHYLENE GLYCOL BIS (N-ISOPROPYL) CARBAMATE.
Claim 4
Dependent Claim
5 words
DIETHYLENE GLYCOL BIS (N-ISOPROPYL) CARBAMATE.
Claim 5
Dependent Claim
5 words
DIETHYLENE GLYCOL BIS (N-CYCLOHEXYL) CARBAMATER.
Claim 6
Dependent Claim
5 words
DIETHYLENE GLYCOL BIS (N-CYCLOHEXYL) CARBAMATER.
Claim 7
Dependent Claim
34 words
A DIESTER AMIDE OF (A) A CHLOROAMILINE AND (B) A DIHYDRIC ALCOHOL BIS (ACID CARBAMATE) WHEREIN BOTH ACID GROUPS OF (B) ARE AMIDATED WITH (A), SAID DIHYDRIC ALCOHOL CONTAINING UP TO 10 CARBON ATOMS.
Claim 8
Dependent Claim
34 words
A DIESTER AMIDE OF (A) A CHLOROAMILINE AND (B) A DIHYDRIC ALCOHOL BIS (ACID CARBAMATE) WHEREIN BOTH ACID GROUPS OF (B) ARE AMIDATED WITH (A), SAID DIHYDRIC ALCOHOL CONTAINING UP TO 10 CARBON ATOMS.
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) | 1960-01-15 | 1960-07-16 | 1961-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-15 | 1964-07-16 | 1965-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-15 | 1968-07-16 | 1969-01-15 | $7700.00 | Window Closed / Lapsed |