US3365387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Off-stream decoking of a minor portion of on-stream thermal cracking tubes
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1966-04-29
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Granted: 1968-01-23
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Expires: 1986-04-29
Abstract
No abstract record available.
Inventors
- 👤 Robert P Cahn
- 👤 John A Kivlen
- 👤 David K Thurlow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:14
CPC Classifications
C; C10; C10G; C10G9/00; C10G9/14; C10G9/16; H; H02; H02J; H02J2101/00; H02J2101/20; H02J2101/28
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) | 1971-01-22 | 1971-07-24 | 1972-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-22 | 1975-07-24 | 1976-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-22 | 1979-07-24 | 1980-01-23 | $7700.00 | Window Closed / Lapsed |