US3435893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger component formed with flexible plastic tubes
Assignee: Ametek Inc
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Filing: 1967-07-31
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Granted: 1969-04-01
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Expires: 1987-07-31
Abstract
No abstract record available.
Inventors
- 👤 Michael S Withers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:38
CPC Classifications
B; B29; B29C; B29C57/00; B23; B23P; B23P15/00; B23P15/26; B29C65/00; B29C65/02; B29C65/18; B29C65/24; B29C65/30; B29C65/305; B29C65/34; B29C65/3404; B29C65/3408; B29C65/3412; B29C65/3472; B29C65/3484; B29C65/3492; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/13; B29C66/137; B29C66/50; B29C66/51; B29C66/52; B29C66/522; B29C66/5227; B29C66/80; B29C66/83; B29C66/832; B29C66/8322; B29C67/00; B29C67/0044; F; F28; F28F; F28F21/00; F28F21/06; F28F21/062; F28F9/00; F28F9/007; F28F9/013; B29C2793/00; B29C2793/0027; B29C66/70; B29C66/72; B29C66/725; B29C66/7252; B29C66/72523; B29L; B29L2031/00; B29L2031/18; B29L2031/60; B29L2031/601; B29L2031/602
Claims Analysis
Total Claims: 0
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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) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |