US3520047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of shaping the end of a pipe of thermoplastic material into a bell
Assignee: KUNSTSTOFFWERK Gebr ANGER AND CO GmbH
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Filing: 1966-07-29
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Granted: 1970-07-14
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Expires: 1986-07-29
Abstract
No abstract record available.
Inventors
- 👤 Karl Muhlner
- 👤 Karl Jirka
- 👤 Johann Gutlhuber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:53
CPC Classifications
F; F16; F16L; F16L47/00; F16L47/06; F16L47/08; B; B29; B29C; B29C57/00; B29C57/02; B29C57/025; F16L47/10; Y; Y10; Y10S; Y10S277/00; Y10S277/924; Y10S425/00; Y10S425/218; Y10T; Y10T29/00; Y10T29/49; Y10T29/4981; Y10T29/49826; Y10T29/49863; Y10T29/4987; Y10T29/49872
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) | 1973-07-13 | 1974-01-12 | 1974-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-13 | 1978-01-12 | 1978-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-13 | 1982-01-12 | 1982-07-14 | $7700.00 | Window Closed / Lapsed |