US2706725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymers of vinyl benzal acetophenones
Assignee: Eastman Kodak Co
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Filing: 1951-09-13
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Granted: 1955-04-19
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Expires: 1971-09-13
Abstract
No abstract record available.
Inventors
- 👤 Cornelius C Unruh
- 👤 Charles F H Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:54
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/038; G03F7/0388; C; C08; C08F; C08F22/00; C08F22/04; C08F8/00; C08F8/02; C08F8/10; C08F8/28; C08F2800/00; C08F2800/10; C08F2810/00; C08F2810/30; Y; Y10; Y10S; Y10S522/00; Y10S522/904
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
A PROCESS FOR PREPARING A POLYMER WHICH COMPRISES CONDENSING A POLYMER OF A COMPOUND HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
18 words
A PROCESS FOR PREPARING A POLYMER WHICH COMPRISES CONDENSING A POLYMER OF A COMPOUND HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
US2566302A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-04-18 | 1958-10-18 | 1959-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-18 | 1962-10-18 | 1963-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-18 | 1966-10-18 | 1967-04-19 | $7700.00 | Window Closed / Lapsed |