Patent US4209018A successfully refreshed from Google Patents.
Patent US2734009A successfully refreshed from Google Patents.
US2734009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
coffey
Assignee: —
•
Filing: —
•
Granted: 1956-02-07
•
Expires: 1973-02-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:45
CPC Classifications
F; F16; F16J; F16J3/00; F16J3/02; Y; Y10; Y10T; Y10T156/00; Y10T156/17; Y10T156/1702; Y10T156/1712; Y10T156/1722; Y10T156/1727; Y10T156/1729; Y10T428/00; Y10T428/249921; Y10T428/249923
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
81 words
A DIAPHRAGM MATERIAL COMPRISING A CHAFER DUCK BASE HAVING A WEAVE OF APPROXIMATELY TWENTY THREADS PER INCH, THE INDIVIDUAL THREADS BEING COATED BUT NOT IMPREGNATED OR BONDED TOGETHER WITH SYNTHETIC RUBBER, AND IMPERFORATE SURFACE LAYERS OF SYNTHETIC RUBBER SUPERPOSED UPON AND CONFORMING TO BUT NOT BONDED TO THE THREADS OF THE FABRIC, SAID LAYERS BEING MECHANICALLY BONDED TOGETHER AND TO SAID THREADS BY INTEGRAL PROJECTIONS EXTENDING THROUGH THE INTERSTICES OF THE CLOTH AND, WITH SAID SURFACE LAYERS, EMBEDDING SAID THREADS, AND
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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) | 1959-02-06 | 1959-08-08 | 1960-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-06 | 1963-08-08 | 1964-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-06 | 1967-08-08 | 1968-02-07 | $7700.00 | Window Closed / Lapsed |