Patent US3205113A successfully refreshed from Google Patents.
US3205113A
Expired / Lapsed
US
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Method of making a valve diaphragm
Assignee: Hills Maccanna Co
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Filing: 1962-09-18
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Granted: 1965-09-07
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Expires: 1982-09-18
Abstract
No abstract record available.
Inventors
- 👤 Jr Rolland Mcfarland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:32
CPC Classifications
F; F16; F16K; F16K7/00; B; B29; B29C; B29C43/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A METHOD OF MAKING A DIAPHRAGM STRUCTURE COMPRISING FORMING A LINER MEMBER OF POLYTETRAFLUOROETHYLENE, SUBJECTING ONLY PERIPHERAL PORTIONS OF AN INNER FACE OF SAID LINER MEMBER TO A SOLUTION OF LIQUID AMMONIA AND SODIUM AND THEREBY CHEMICALLY ACTIVATING ONLY SAID PERIPHERAL PORTIONS OF THE INNER FACE, AND THEN ADHESIVELY SECURING A DIAPHRAGM BODY AGAINST ONLY SAID PERIPHERAL PORTIONS OF SAID FACE OF THE LINER MEMBER, WHEREBY TO PERMIT RELATIVE MOVEMENT BETWEEN OTHER PORTIONS OF THE LINER MEMBER AND THE BODY FOR DISTRIBUTING LOCAL STRESSES IN THE LINER MEMBER WHEN THE LIAPHRAGM STRUCTURE IS TIGHTLY COMPRESSED AGAINST A VALVE SEAT.
Claim 2
Independent Claim
99 words
A METHOD OF MAKING A DIAPHRAGM STRUCTURE COMPRISING FORMING A LINER MEMBER OF POLYTETRAFLUOROETHYLENE, SUBJECTING ONLY PERIPHERAL PORTIONS OF AN INNER FACE OF SAID LINER MEMBER TO A SOLUTION OF LIQUID AMMONIA AND SODIUM AND THEREBY CHEMICALLY ACTIVATING ONLY SAID PERIPHERAL PORTIONS OF THE INNER FACE, AND THEN ADHESIVELY SECURING A DIAPHRAGM BODY AGAINST ONLY SAID PERIPHERAL PORTIONS OF SAID FACE OF THE LINER MEMBER, WHEREBY TO PERMIT RELATIVE MOVEMENT BETWEEN OTHER PORTIONS OF THE LINER MEMBER AND THE BODY FOR DISTRIBUTING LOCAL STRESSES IN THE LINER MEMBER WHEN THE LIAPHRAGM STRUCTURE IS TIGHTLY COMPRESSED AGAINST A VALVE SEAT.
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) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |