US2930769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of foaming a saturated polyester using a dicarboxylic acid diazide as the blowing agent and product obtained thereby
Assignee: Imperial Chemical Industries Ltd
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Filing: 1956-11-27
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Granted: 1960-03-29
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Expires: 1976-11-27
Abstract
No abstract record available.
Inventors
- 👤 Geoffrey A Haggis
- 👤 Lambert Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:32
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/10; C08J2367/00; C08J2367/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
PROCESS FOR THE MANUUFACTURE OF SOLID FOAMED MATERIALS WHICH COMPRISES MIXING A SATURATED SYNTHETIC CONDENSATION POLYMER WHICH IS A POLYESTER DIRIVED GY CONDENSATION REACTION BETWEEN A SATURATED DICARBOXYLIC ACID AND SATURATED POLYHYDRIC ALCOHOL WITH A DICARBOXYLIC ACID DIAZIDE AND THEN HEATING THE MIXTURE THEREBY PRODUCED TO A TEMPERATURE IN THE RANGE OF 50* TO 100*C.
Claim 2
Dependent Claim
55 words
PROCESS FOR THE MANUUFACTURE OF SOLID FOAMED MATERIALS WHICH COMPRISES MIXING A SATURATED SYNTHETIC CONDENSATION POLYMER WHICH IS A POLYESTER DIRIVED GY CONDENSATION REACTION BETWEEN A SATURATED DICARBOXYLIC ACID AND SATURATED POLYHYDRIC ALCOHOL WITH A DICARBOXYLIC ACID DIAZIDE AND THEN HEATING THE MIXTURE THEREBY PRODUCED TO A TEMPERATURE IN THE RANGE OF 50* TO 100*C.
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) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |