US2854744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of locking and sealing tubular structures
Assignee: Individual
•
Filing: 1956-02-17
•
Granted: 1958-10-07
•
Expires: 1976-02-17
Abstract
No abstract record available.
Inventors
- 👤 Sydney R Crockett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:05
CPC Classifications
B; B21; B21D; B21D39/00; B21D39/04; F; F02; F02K; F02K9/00; F02K9/08; F02K9/32; F02K9/34; F02K9/343; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49925; Y10T29/49927; Y10T29/49929; Y10T403/00; Y10T403/49; Y10T403/57
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2477676A
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US2485699A
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US1911775A
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US2198643A
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US2272244A
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US2327650A
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US2426526A
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US2741498A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-06 | 1962-04-07 | 1962-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-06 | 1966-04-07 | 1966-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-06 | 1970-04-07 | 1970-10-07 | $7700.00 | Window Closed / Lapsed |