US2996466A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing extruded high molecular weight substances and the resulting products
Assignee: Onderzoekings Instituut Research
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Filing: 1956-12-21
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Granted: 1961-08-15
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Expires: 1976-12-21
Abstract
No abstract record available.
Inventors
- 👤 Kessler Jacob Christ Ferdinand
- 👤 Spreeuwers Harm Roelf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:17
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/022; B29C48/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
IN A PROCESS FOR THE PREPARATION OF EXTRUSION MATERIAL ON THE BASIS OF HIGH MOLECULAR WEIGHT LINEAR POLYCONDENSATION POLYMERS SELECTED FROM THE CLASS CONSISTING OF POLYAMIDES AND POLYURETHANES, SAID POLYAMIDES HAVING THE STRUCTURAL UNIT
Claim 2
Dependent Claim
34 words
IN A PROCESS FOR THE PREPARATION OF EXTRUSION MATERIAL ON THE BASIS OF HIGH MOLECULAR WEIGHT LINEAR POLYCONDENSATION POLYMERS SELECTED FROM THE CLASS CONSISTING OF POLYAMIDES AND POLYURETHANES, SAID POLYAMIDES HAVING THE STRUCTURAL UNIT
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) | 1964-08-14 | 1965-02-13 | 1965-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-14 | 1969-02-13 | 1969-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-14 | 1973-02-13 | 1973-08-15 | $7700.00 | Window Closed / Lapsed |