US3528458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubular insulation formed by an extrusion process
Assignee: Union Carbide Canada Ltd
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Filing: 1968-11-13
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Granted: 1970-09-15
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Expires: 1988-11-13
Abstract
No abstract record available.
Inventors
- 👤 Bruno Lothar Gaeckel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:23
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/14; F16L59/143; B; B29; B29C; B29C44/00; B29C44/20; B29C44/32; B29C44/322; B29C48/00; B29C48/15; B29C48/151; F16L59/02; F16L59/028; B29C48/03; B29C48/09; Y; Y10; Y10S; Y10S138/00; Y10S138/09
Claims Analysis
Total Claims: 0
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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) | 1973-09-14 | 1974-03-16 | 1974-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-14 | 1978-03-16 | 1978-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-14 | 1982-03-16 | 1982-09-15 | $7700.00 | Window Closed / Lapsed |