Patent US2708617A successfully refreshed from Google Patents.
US2708617A
Expired / Lapsed
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Formation of films and filament directly from polymer intermediates
Assignee: EIDP Inc
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Filing: 1951-05-12
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Granted: 1955-05-17
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Expires: 1971-05-12
Abstract
No abstract record available.
Inventors
- 👤 Magat Eugene Edward
- 👤 Strachan Donald Rittler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:11
CPC Classifications
B; B29; B29D; B29D7/00; B29D7/01; Y; Y10; Y10S; Y10S264/00; Y10S264/77; Y10S8/00; Y10S8/10; Y10S8/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A PROCESS FOR THE DIRECT FORMATION OF CONDENSATION POLYMER FILMS AND FILAMENTS FROM INTERMEDIATES WHICH COMPRISES CONDUCTING AN INTERPHASE POLYMERIZATION BETWEEN FAST-REACTING ORGANIC CONDENSATION POLYMERFORMING INTERMEDIATES AT A CONTINUING INTERFACE OF CONTROLLED SHAPED BETWEEN TWO LIQUID PHASES EACH CONTAINING AN INTERMEDIATE WHICH REACTS RAPIDLY WITH AN INTERMEDIATE IN THE OTHER PHASE TO FORM A SHAPED POLYMER, SEPARATING THE PHASES AND INSOLUBLE THEREIN AND WITHDRAWING THE POLYMER FROM SAID INTERFACE.
Claim 2
Dependent Claim
69 words
A PROCESS FOR THE DIRECT FORMATION OF CONDENSATION POLYMER FILMS AND FILAMENTS FROM INTERMEDIATES WHICH COMPRISES CONDUCTING AN INTERPHASE POLYMERIZATION BETWEEN FAST-REACTING ORGANIC CONDENSATION POLYMERFORMING INTERMEDIATES AT A CONTINUING INTERFACE OF CONTROLLED SHAPED BETWEEN TWO LIQUID PHASES EACH CONTAINING AN INTERMEDIATE WHICH REACTS RAPIDLY WITH AN INTERMEDIATE IN THE OTHER PHASE TO FORM A SHAPED POLYMER, SEPARATING THE PHASES AND INSOLUBLE THEREIN AND WITHDRAWING THE POLYMER FROM SAID INTERFACE.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-16 | 1958-11-15 | 1959-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-16 | 1962-11-15 | 1963-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-16 | 1966-11-15 | 1967-05-17 | $7700.00 | Window Closed / Lapsed |