US3524897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lng refrigerant for fractionator overhead
Assignee: Lummus Technology LLC
•
Filing: 1968-10-17
•
Granted: 1970-08-18
•
Expires: 1988-10-17
Abstract
No abstract record available.
Inventors
- 👤 Ludwig Kniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:06
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/0204; F25J3/0209; F25J3/0214; C; C07; C07C; C07C11/00; C07C11/02; C07C11/04; C07C7/00; C07C7/04; C10; C10K; C10K3/00; F17; F17C; F17C9/00; F17C9/02; F17C9/04; F25J3/0219; F25J3/0228; F25J3/0233; F25J3/0238; F25J3/0242; F25J3/0247; F25J3/0252; F17C2265/00; F17C2265/05; F25J2200/00; F25J2200/02; F25J2200/04; F25J2200/74; F25J2205/00; F25J2205/82; F25J2210/00; F25J2210/02; F25J2210/06; F25J2210/12; F25J2210/62; F25J2215/00; F25J2215/62; F25J2215/64; F25J2245/00; F25J2245/02; F25J2260/00; F25J2260/02; F25J2260/60; F25J2270/00; F25J2270/90; F25J2270/904
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2471602A
Cited
US2498806A
Cited
US2672489A
Cited
US2600110A
Cited
US2777305A
Cited
US2952984A
Cited
US3034307A
Cited
US3055183A
Cited
US3095293A
Cited
US3119677A
Cited
US3261169A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-17 | 1974-02-16 | 1974-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-17 | 1978-02-16 | 1978-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-17 | 1982-02-16 | 1982-08-18 | $7700.00 | Window Closed / Lapsed |