US3356778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of making seals for pipe joints
Assignee: Robinson Clay Product Co
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Filing: 1964-11-23
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Granted: 1967-12-05
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Expires: 1984-11-23
Abstract
No abstract record available.
Inventors
- 👤 Richard H Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:09
CPC Classifications
F; F16; F16L; F16L13/00; F16L13/10; F16L13/11; F16L21/00; F16L21/02; F16L21/035
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A METHOD OF MAKING A SEAL FOR PIPE JOINTS COMPRISING THE STEPS OF (1) POSITIONING A SINGLE UNITARY ANNULAR THIN HARD TOUGH SHELL OF PLASTIC MATERIAL IN RADIAL SPACED RELATIONSHIP WITH ONE END OF THE PIPE LENGTH FOR FORMING A SEAL FOR CONNECTION WITH OTHER PIPES, SAID SHELL EXTENDING THE FULL AXIAL LENGTH OF THE SEAL, (2) APPLYING A POUABLE WATER RESISTANT COMPOSITION BETWEEN SAID SHELL AND ITS ASSOCIATED PIPE END, AND (3) SOLIDIFYING AND PERMANENTLY BONDING SAID COMPOSITION TO THE SHELL AND TO THE PIPE END AND THERBY FORM A STRONG WATER RESISTANT SEAL ON SAID PIPE END.
Claim 2
Independent Claim
99 words
A METHOD OF MAKING A SEAL FOR PIPE JOINTS COMPRISING THE STEPS OF (1) POSITIONING A SINGLE UNITARY ANNULAR THIN HARD TOUGH SHELL OF PLASTIC MATERIAL IN RADIAL SPACED RELATIONSHIP WITH ONE END OF THE PIPE LENGTH FOR FORMING A SEAL FOR CONNECTION WITH OTHER PIPES, SAID SHELL EXTENDING THE FULL AXIAL LENGTH OF THE SEAL, (2) APPLYING A POUABLE WATER RESISTANT COMPOSITION BETWEEN SAID SHELL AND ITS ASSOCIATED PIPE END, AND (3) SOLIDIFYING AND PERMANENTLY BONDING SAID COMPOSITION TO THE SHELL AND TO THE PIPE END AND THERBY FORM A STRONG WATER RESISTANT SEAL ON SAID PIPE END.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |