US2955807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-exchange apparatus
Assignee: United Coke and Chemical Co
•
Filing: 1954-08-02
•
Granted: 1960-10-11
•
Expires: 1974-08-02
Abstract
No abstract record available.
Inventors
- 👤 Riley Harry Lister
- 👤 Norris John
- 👤 Coates Raiffe Greaves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:55
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/0058; B; B01; B01D; B01D7/00; B01D7/02; C; C07; C07C; C07C51/00; C07C51/54; C07C51/573; F28B; F28B1/00; F28B1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US163706A
Cited
US1382670A
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US1677901A
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US1654190A
Cited
US1713534A
Cited
US1853236A
Cited
US1849057A
Cited
US1966632A
Cited
US2402881A
Cited
US2455314A
Cited
US2583013A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-11 | 1964-04-11 | 1964-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-11 | 1968-04-11 | 1968-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-11 | 1972-04-11 | 1972-10-11 | $7700.00 | Window Closed / Lapsed |