US2995781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making tubular conduits
Assignee: Individual
•
Filing: 1957-11-19
•
Granted: 1961-08-15
•
Expires: 1977-11-19
Abstract
No abstract record available.
Inventors
- 👤 Clarence L Sipler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:04
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/28; B29C70/40; B29C70/42; B29C70/44; B29C70/446; B29C43/00; B29C43/02; B29C43/10; B29C43/12; B29L; B29L2023/00; F; F05; F05C; F05C2225/00; F05C2225/08; Y; Y10; Y10S; Y10S264/00; Y10S264/50
Claims Analysis
Total Claims: 0
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US2815534A
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US2826784A
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US2867889A
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US2897840A
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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 |