US3398023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sight glass cleaning
Assignee: Detrex Corp
•
Filing: 1964-01-21
•
Granted: 1968-08-20
•
Expires: 1984-01-21
Abstract
No abstract record available.
Inventors
- 👤 John B Jacobsen
- 👤 William R Carpenter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:51
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/52; D; D06; D06F; D06F43/00; D06F43/08; D06F43/081
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
IN THE OPERATION OF A VESSEL THROUGH WHICH WAVE ENERGY IS PASSED FOR INSPECTION OR CONTROL PURPOSES, SAID ENERGY PASSING THROUGH THE PLANES OF THE WALLS AT OPPOSED LOCATIONS, THE METHOD OF MAINTAINING THE INTERIOR SURFACES OF THE WALL PLANES AT THE ENERGY PASSAGE POINTS CLEAN AND FREE OF RESIDUE, SAID METHOD COMPRISING DIRECTING S SUPPLY OF COMPATIBLE CLEANING FLUID TO THE INTERIOR SURFACES OF THE WALL PLANES AT THE ENERGY PASSAGE POINTS FOR INTERPOSING SAID CLEAN COMPATIBLE FLUID BETWEEN THE VESSEL WALL AND THE NORMAL CONTENTS OF THE VESSEL.
Claim 2
Dependent Claim
90 words
IN THE OPERATION OF A VESSEL THROUGH WHICH WAVE ENERGY IS PASSED FOR INSPECTION OR CONTROL PURPOSES, SAID ENERGY PASSING THROUGH THE PLANES OF THE WALLS AT OPPOSED LOCATIONS, THE METHOD OF MAINTAINING THE INTERIOR SURFACES OF THE WALL PLANES AT THE ENERGY PASSAGE POINTS CLEAN AND FREE OF RESIDUE, SAID METHOD COMPRISING DIRECTING S SUPPLY OF COMPATIBLE CLEANING FLUID TO THE INTERIOR SURFACES OF THE WALL PLANES AT THE ENERGY PASSAGE POINTS FOR INTERPOSING SAID CLEAN COMPATIBLE FLUID BETWEEN THE VESSEL WALL AND THE NORMAL CONTENTS OF THE VESSEL.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |