US3402147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing polyester resins from a telomer
Assignee: Hoechst AG
•
Filing: 1964-01-21
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Granted: 1968-09-17
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Expires: 1984-01-21
Abstract
No abstract record available.
Inventors
- 👤 Starck Werner
- 👤 Winter Jakob
- 👤 Rinno Helmut
- 👤 Lampe Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:18
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A PROCESS FOR THE PRODUCTION OF POLYESTER RESINS WHICH COMPRISES THE STEP OF REACTING, AT A TEMPERATURE WITHIN THE RANGE OF 100*C. TO 190*C. UNTIL AN ACID NUMBER OF 40 TO 140 IS REACHED. (A) AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF ALCOHOLS CONTAINING FROM 1 TO 3 HYDROXYL GROUPS, WITH UP TO 20% OF THE HYDROXYL GROUPS PRESENT IN THE STARTING SUBSTANCES ORIGINATING FROM ALCOHOLS HAVING 1 AND 3 TO 4 HYDROXYL GROUPS, (B) A MEMBER SELECTED FROM THE GROUP CONSISTING OF TELOMERS HAVING A MOLECULAR WEIGHT OF 400 TO 2,000 AND CONTAINING 3 TO 12 CARBOXYL GROUPS, TELOMERS HAVING A MOLECULAR WEIGHT OF 400 TO 2,000 AND CONTAINING CARBOXYLIC ANHYDRIDE GROUPS IN AN AMOUNT CORRESPONDING TO 3 TO 12 CARBOXYL GROUPS, SAID TELOMERS BEING DEFINED AS (A) A TELOMER CONSISTING OF 3 TO 12 STRUCTURAL UNITS OF A FORMULA
Claim 2
Dependent Claim
144 words
A PROCESS FOR THE PRODUCTION OF POLYESTER RESINS WHICH COMPRISES THE STEP OF REACTING, AT A TEMPERATURE WITHIN THE RANGE OF 100*C. TO 190*C. UNTIL AN ACID NUMBER OF 40 TO 140 IS REACHED. (A) AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF ALCOHOLS CONTAINING FROM 1 TO 3 HYDROXYL GROUPS, WITH UP TO 20% OF THE HYDROXYL GROUPS PRESENT IN THE STARTING SUBSTANCES ORIGINATING FROM ALCOHOLS HAVING 1 AND 3 TO 4 HYDROXYL GROUPS, (B) A MEMBER SELECTED FROM THE GROUP CONSISTING OF TELOMERS HAVING A MOLECULAR WEIGHT OF 400 TO 2,000 AND CONTAINING 3 TO 12 CARBOXYL GROUPS, TELOMERS HAVING A MOLECULAR WEIGHT OF 400 TO 2,000 AND CONTAINING CARBOXYLIC ANHYDRIDE GROUPS IN AN AMOUNT CORRESPONDING TO 3 TO 12 CARBOXYL GROUPS, SAID TELOMERS BEING DEFINED AS (A) A TELOMER CONSISTING OF 3 TO 12 STRUCTURAL UNITS OF A FORMULA
References Cited (Backward Citations)
US2561313A
Cited
US3067179A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-17 | 1972-03-18 | 1972-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-17 | 1976-03-18 | 1976-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-17 | 1980-03-18 | 1980-09-17 | $7700.00 | Window Closed / Lapsed |