Patent US2678677A successfully refreshed from Google Patents.
US2678677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube forming apparatus
Assignee: Individual
•
Filing: 1951-03-02
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Granted: 1954-05-18
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Expires: 1971-03-02
Abstract
No abstract record available.
Inventors
- 👤 David E Hervey
- 👤 Robert W Hervey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:34
CPC Classifications
B; B27; B27D; B27D1/00; B27D1/04; B27D1/08; B27D1/083; B29; B29C; B29C49/00; B29C49/42; B29C49/44; B29C70/00; B29C70/04; B29C70/28; B29C70/40; B29C70/42; B29C70/46; B29C70/462; B29C43/00; B29C43/02; B29C43/10; B29C43/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1370391A
Cited
US1840489A
Cited
US2296781A
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US2411542A
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US2352533A
Cited
US2388541A
Cited
US2449526A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-17 | 1957-11-16 | 1958-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-17 | 1961-11-16 | 1962-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-17 | 1965-11-16 | 1966-05-18 | $7700.00 | Window Closed / Lapsed |