US3424480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closure connection means for a heat exchanger
Assignee: Individual
•
Filing: 1966-03-30
•
Granted: 1969-01-28
•
Expires: 1986-03-30
Abstract
No abstract record available.
Inventors
- 👤 Richard W Holland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:41
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/0219; F16; F16L; F16L39/00; F16L7/00; F16L7/02; F28D; F28D7/00; F28D7/10; F28D7/106; F28F9/26; F28F2275/00; F28F2275/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US255523A
Cited
FR1348409A
Cited
US980939A
Cited
US1559949A
Cited
US2520755A
Cited
US3109671A
Cited
US3079992A
Cited
US3155404A
Cited
US3377087A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |