US2755109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lock coupling for pipe
Assignee: Dresser Industries Inc
•
Filing: 1953-06-15
•
Granted: 1956-07-17
•
Expires: 1973-06-15
Abstract
No abstract record available.
Inventors
- 👤 Roger E Risley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:31
CPC Classifications
F; F16; F16L; F16L19/00; F16L19/08; F16L19/083; F16L19/086; F16L19/06; F16L19/075
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2059920A
Cited
DE729164C
Cited
US2313323A
Cited
US2610078A
Cited
US2508914A
Cited
US2585453A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-17 | 1960-01-16 | 1960-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-17 | 1964-01-16 | 1964-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-17 | 1968-01-16 | 1968-07-17 | $7700.00 | Window Closed / Lapsed |