US2809957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane resins from 2, 5-dimethyl-2, 5-di(2'-hydroxyethoxy)-3-hexyne
Assignee: Airco Inc
•
Filing: 1955-02-21
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Granted: 1957-10-15
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Expires: 1975-02-21
Abstract
No abstract record available.
Inventors
- 👤 Alio J Buselii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:02
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/675; C08G18/679
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
AS NEW COMPOSITIONS OF MATTERS, THE RESINOUS POLYURETHANE REACTION PRODUCTS OF 2,5-DIMETHYL-2,5-DI(2''-HYDROXYETHOXY)-3-HEXYNE AND A POLYISOCYANATE SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC, AROMATIC, AND CYCLOALKYLENE POLYISOCYANATES.
Claim 2
Dependent Claim
26 words
AS NEW COMPOSITIONS OF MATTERS, THE RESINOUS POLYURETHANE REACTION PRODUCTS OF 2,5-DIMETHYL-2,5-DI(2''-HYDROXYETHOXY)-3-HEXYNE AND A POLYISOCYANATE SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC, AROMATIC, AND CYCLOALKYLENE POLYISOCYANATES.
References Cited (Backward Citations)
US2284896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |