US2721837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anodising of metal articles
Assignee: Aero Zipp Fasteners Ltd
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Filing: 1951-12-28
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Granted: 1955-10-25
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Expires: 1971-12-28
Abstract
No abstract record available.
Inventors
- 👤 Backer Joachim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:00
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/005; C25D17/00; C25D17/10; C25D17/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A METHOD OF ANODIZING A METAL ARTICLE, COMPRISING THE STEPS OF CONTAINING AN ANODIC BATH IN A VESSEL, INTRODUCING THE ARTICLE INTO THE ANODIC BATH, WHIRLING THE VESSEL AROUND AN EXTRANEOUS AXIS AND CREATING A CENTRIFUGAL FORCE ACTING ON THE METAL ARTICLE, AND PASSING AN ELECTRIC CURRENT FROM AN ANODIC CONTACT ELEMENT IN THE VESSEL THROUGH THE ARTICLE AND THENCE THROUGH THE ANODIC BATH IN CONTACT WITH THE ARTICLE TO A CATHODIC CONTACT ELEMENT IN THE VESSEL WHILE HOLDING THE ARTICLE AGAINST,
Claim 2
Independent Claim
82 words
A METHOD OF ANODIZING A METAL ARTICLE, COMPRISING THE STEPS OF CONTAINING AN ANODIC BATH IN A VESSEL, INTRODUCING THE ARTICLE INTO THE ANODIC BATH, WHIRLING THE VESSEL AROUND AN EXTRANEOUS AXIS AND CREATING A CENTRIFUGAL FORCE ACTING ON THE METAL ARTICLE, AND PASSING AN ELECTRIC CURRENT FROM AN ANODIC CONTACT ELEMENT IN THE VESSEL THROUGH THE ARTICLE AND THENCE THROUGH THE ANODIC BATH IN CONTACT WITH THE ARTICLE TO A CATHODIC CONTACT ELEMENT IN THE VESSEL WHILE HOLDING THE ARTICLE AGAINST,
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) | 1958-10-24 | 1959-04-25 | 1959-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-24 | 1963-04-25 | 1963-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-24 | 1967-04-25 | 1967-10-25 | $7700.00 | Window Closed / Lapsed |