US3075949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear polyethers of bis (hydroxymethyl) durene and diphenols
Assignee: Eastman Kodak Co
•
Filing: 1959-12-11
•
Granted: 1963-01-29
•
Expires: 1979-12-11
Abstract
No abstract record available.
Inventors
- 👤 John R Caldwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:04
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/34; C08G65/38; C08G65/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A HIGHLY POLYMERIC FILM-FORMING LINEAR POLYETHER HAVIN A SOFTENING TEMPERATURE ABOVE 200*C. AND HAVING A MOLECULAR WEIGHT OF FROM ABOUT 7,500 TO ABOUT 200,000 WHICH IS ESSENTIALLY COMPOSED OF RECURRING UNITS HAVING THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
36 words
A HIGHLY POLYMERIC FILM-FORMING LINEAR POLYETHER HAVIN A SOFTENING TEMPERATURE ABOVE 200*C. AND HAVING A MOLECULAR WEIGHT OF FROM ABOUT 7,500 TO ABOUT 200,000 WHICH IS ESSENTIALLY COMPOSED OF RECURRING UNITS HAVING THE FOLLOWING GENERAL 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) | 1966-01-28 | 1966-07-30 | 1967-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-28 | 1970-07-30 | 1971-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-28 | 1974-07-30 | 1975-01-29 | $7700.00 | Window Closed / Lapsed |