US2972779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic tubing process
Assignee: Don Baxter Inc
•
Filing: 1958-11-14
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Granted: 1961-02-28
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Expires: 1978-11-14
Abstract
No abstract record available.
Inventors
- 👤 Calvin C Cowley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:43
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0009; A61M25/0015; B; B26; B26F; B26F1/00; B26F1/0015; B29; B29C; B29C37/00; B29C37/02; Y; Y10; Y10S; Y10S451/00; Y10S451/913; Y10T; Y10T83/00; Y10T83/04; Y10T83/0405; Y10T83/0419; Y10T83/0596
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2271477A
Cited
US1339789A
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US1839699A
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US2259488A
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US2314262A
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US2308484A
Cited
US2428407A
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US2481488A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-28 | 1964-08-29 | 1965-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-28 | 1968-08-29 | 1969-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-28 | 1972-08-29 | 1973-02-28 | $7700.00 | Window Closed / Lapsed |