Patent US3491182A successfully refreshed from Google Patents.
US3491182A
Expired / Lapsed
US
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Method of joining together lengths of pipe
Assignee: 3M Co
•
Filing: 1967-10-04
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Granted: 1970-01-20
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Expires: 1987-10-04
Abstract
No abstract record available.
Inventors
- 👤 David N Hunder
- 👤 Richard G Eikos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:26
CPC Classifications
F; F16; F16L; F16L41/00; F16L41/04; F16L41/06; F16L13/00; F16L13/10; F16L13/11; F16L41/02; F16L55/00; F16L55/16; F16L55/168; F16L55/17; F16L55/171; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49428; Y10T29/49718; Y10T29/49746; Y10T29/49826; Y10T29/49879; Y10T29/49888; Y10T29/49893; Y10T29/4998; Y10T403/00; Y10T403/57; Y10T403/5761; Y10T403/5766; Y10T403/5773
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US333011A
Cited
US494147A
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US647996A
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GB190018666A
Cited
GB190810751A
Cited
US978346A
Cited
US924262A
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US2128720A
Cited
US2180695A
Cited
US3177528A
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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) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |