Patent US3223604A successfully refreshed from Google Patents.
US3223604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for eliminating spark hazards
Assignee: Union Oil Company of California
•
Filing: 1962-05-25
•
Granted: 1965-12-14
•
Expires: 1982-05-25
Abstract
No abstract record available.
Inventors
- 👤 Glenn A Marsh
- 👤 Alfred E Wolter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:25
CPC Classifications
C; C23; C23F; C23F13/00; C23F13/02; C23F13/04; H; H05; H05F; H05F3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
AN APPARATUS FOR REDUCING THE POTENTIAL BETWEEN A SHIP AND AN ADJACENT, PARTIALLY SUBMERGED, METALLIC STRUCTURE COMPRISING CIRCUIT MEANS, INCLUDING AN ANODE SUBMERGED BETWEEN SAID SHIP AND SAID STRUCTURE, FOR APPLYING DIRECT CURRENT TO THE SIDE OF SAID SHIP ADAJACENT TO SAID STRUCTURE, MEANS RESPONSIVE TO THE POTENTIAL DIFFERENCE BETWEEN SAID SHIP AND STRUCTURE FOR CONTROLLING THE MAGNITUDE OF SAID APPLIED CURRENT, SAID RESPONSIVE MEANS COMPRISING PARALLEL RESISTORS, AT LEAST ONE OF WHICH BEING ADAPTED TO BE CUT OUT OF SAID CIRCUIT TO DECREASE SAID APPLIED CURRENT WHEN THE SHIP IS NEGATIVE IN POTENTIAL WITH RESPECT TO
Claim 2
Independent Claim
97 words
AN APPARATUS FOR REDUCING THE POTENTIAL BETWEEN A SHIP AND AN ADJACENT, PARTIALLY SUBMERGED, METALLIC STRUCTURE COMPRISING CIRCUIT MEANS, INCLUDING AN ANODE SUBMERGED BETWEEN SAID SHIP AND SAID STRUCTURE, FOR APPLYING DIRECT CURRENT TO THE SIDE OF SAID SHIP ADAJACENT TO SAID STRUCTURE, MEANS RESPONSIVE TO THE POTENTIAL DIFFERENCE BETWEEN SAID SHIP AND STRUCTURE FOR CONTROLLING THE MAGNITUDE OF SAID APPLIED CURRENT, SAID RESPONSIVE MEANS COMPRISING PARALLEL RESISTORS, AT LEAST ONE OF WHICH BEING ADAPTED TO BE CUT OUT OF SAID CIRCUIT TO DECREASE SAID APPLIED CURRENT WHEN THE SHIP IS NEGATIVE IN POTENTIAL WITH RESPECT TO
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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |