US2600376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polmesters of hydroxybenzoic acids
Assignee: Eastman Kodak Co
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Filing: 1949-11-26
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Granted: 1952-06-17
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Expires: 1969-11-26
Abstract
No abstract record available.
Inventors
- 👤 John R Caldwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:40
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/06; C08G63/065
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
A PROCESS FOR PREPARING POLYESTERS COMPRISING CONDENSING, AT AN ELEVATED TEMPERATURE AND UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS, A HYDROXYBENZOIC ACID SELECTED FROM THE GROUP CONSISTING OF THOSE REPRESENTED BY THE FOLLOWING FORMULAS:
Claim 2
Dependent Claim
31 words
A PROCESS FOR PREPARING POLYESTERS COMPRISING CONDENSING, AT AN ELEVATED TEMPERATURE AND UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS, A HYDROXYBENZOIC ACID SELECTED FROM THE GROUP CONSISTING OF THOSE REPRESENTED BY THE FOLLOWING FORMULAS:
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) | 1955-06-17 | 1955-12-17 | 1956-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-17 | 1959-12-17 | 1960-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-17 | 1963-12-17 | 1964-06-17 | $7700.00 | Window Closed / Lapsed |