US3238273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethanes and process for preparing same
Assignee: Shell USA Inc
•
Filing: 1962-06-29
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Granted: 1966-03-01
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Expires: 1982-06-29
Abstract
No abstract record available.
Inventors
- 👤 Horace N Hampson
- 👤 Turner Robert John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:06
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/4009; C08G18/4045; C08L; C08L75/00; C08L75/04; Y; Y10; Y10S; Y10S521/00; Y10S521/914
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A POLYURETHANE RESIN COMPRISING THE REACTIN PRODUCT OF (1) AN ORGANIC POLYFUNCTIONAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF POLYISOCYANATES AND POLYISOTHIOCYANATES, (2) A COMPOUND SELECTED FROM THE GROUP CONSISTING OF POLYOXYALKYLENE POLYOLS AND POLYESTERS HAVING TERMINAL HYDROXYL GROUPS AND (3) AN ADDUCT OF (A) A GLYCIDYL ETHER PREPARED BY REACTING EPICHLOROHYDRIN WITH A POLYHYDRIC ORGANIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF POLYHYDRIC ALCOHOLS AND POLYHYDRIC PHENOLS AND (B) A BIS(HYDROXYALKYL)AMINE.
Claim 2
Dependent Claim
72 words
A POLYURETHANE RESIN COMPRISING THE REACTIN PRODUCT OF (1) AN ORGANIC POLYFUNCTIONAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF POLYISOCYANATES AND POLYISOTHIOCYANATES, (2) A COMPOUND SELECTED FROM THE GROUP CONSISTING OF POLYOXYALKYLENE POLYOLS AND POLYESTERS HAVING TERMINAL HYDROXYL GROUPS AND (3) AN ADDUCT OF (A) A GLYCIDYL ETHER PREPARED BY REACTING EPICHLOROHYDRIN WITH A POLYHYDRIC ORGANIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF POLYHYDRIC ALCOHOLS AND POLYHYDRIC PHENOLS AND (B) A BIS(HYDROXYALKYL)AMINE.
References Cited (Backward Citations)
GB873264A
Cited
US3047540A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |