Patent US2738992A successfully refreshed from Google Patents.
US2738992A
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Pipe coupling
Assignee: Johns Manville Corp
•
Filing: 1953-04-27
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Granted: 1956-03-20
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Expires: 1973-04-27
Abstract
No abstract record available.
Inventors
- 👤 Robert W Heisler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:21
CPC Classifications
F; F16; F16L; F16L21/00; F16L21/02; F16L21/022; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/4987; Y10T29/49872
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB316747A
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GB415425A
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AT147403B
Cited
US2184376A
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US2209235A
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US2398399A
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US2478127A
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US2470818A
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US2462586A
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US2639169A
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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) | 1959-03-20 | 1959-09-19 | 1960-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-20 | 1963-09-19 | 1964-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-20 | 1967-09-19 | 1968-03-20 | $7700.00 | Window Closed / Lapsed |