US2945008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condensation polymers derived from spiroglycols
Assignee: Eastman Kodak Co
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Filing: 1956-08-23
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Granted: 1960-07-12
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Expires: 1976-08-23
Abstract
No abstract record available.
Inventors
- 👤 John R Caldwell
- 👤 Jr Benjamin S Meeks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:33
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/02; C08G64/0208; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/32; C08G18/3203; C08G18/3218; C08G63/00; C08G63/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A HIGH MELTING LINEAR HIGHLY POLYMERIC CONDENSATION POLYMER OF (A) AT LEAST ONE BIFUNCTIONAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF CARBONIC ACID, A DICARBOXYLIC ACID CONTAINING FROM 2 TO 20 CARBON ATOMS AND AN ORGAANIC DIISOCYANATE CONTAINING FROM 6 TO 23 CARBON ATOMS AND (B) AT LEAST ONE BIFUNCTIONAL GLYCOL COMPOSED OF FROM 50 TO 100 MOLE PERCENT OF A SPIRO GLYCOL HAVING THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
67 words
A HIGH MELTING LINEAR HIGHLY POLYMERIC CONDENSATION POLYMER OF (A) AT LEAST ONE BIFUNCTIONAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF CARBONIC ACID, A DICARBOXYLIC ACID CONTAINING FROM 2 TO 20 CARBON ATOMS AND AN ORGAANIC DIISOCYANATE CONTAINING FROM 6 TO 23 CARBON ATOMS AND (B) AT LEAST ONE BIFUNCTIONAL GLYCOL COMPOSED OF FROM 50 TO 100 MOLE PERCENT OF A SPIRO GLYCOL HAVING THE FOLLOWING FORMULA:
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) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |