US3089235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of making thin reinforced diaphragms and in
Assignee: —
•
Filing: —
•
Granted: 1963-05-14
•
Expires: 1980-05-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:05
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/12; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/938
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
THE METHOD OF MAKING A REINFORCED THIN DIAPHRAGM WHICH COMPRISES STARTING FROM A THIN SHEET OF A METAL THAT IS OXIDIZABLE IN AN ELECTROLYTE TO FORM A MICROPOROUS LAYER OF OXIDE ADHERING STRONGLY TO THE METAL SURFACE FREE FROM ANY STRUCTURAL DEFECT AND THE OPPOSITE WALLS OF WHICH ARE PARALLEL TO EACH OTHER, MACHANICALLY SHAPING SAID SHEED SO AS TO FORM STIFFENING PROJECTIONS ON ONE FACE THEREOF AND TO GIVE THE AREAS OF SAID SHEET LOCATED BETWEEN SAID PROJECTIONS THE DESIRED THICKNESS THE OTHER FACE OF SAID SHEET BEING LEFT SMOOTH, AND SUBJACTING SAID SMOOTH FACE OF SAID SHEET TO AN OXIDIZING TREATMENT TO SUCH A DEGREE THAT SAID STIFFENING PROJECTIONS REMAIN UNOXIDIZED BUT THAT THE REMAINING THICKNESS OF THE SHEET SUBSTANTIALLY OXIDIZED.
Claim 2
Independent Claim
123 words
THE METHOD OF MAKING A REINFORCED THIN DIAPHRAGM WHICH COMPRISES STARTING FROM A THIN SHEET OF A METAL THAT IS OXIDIZABLE IN AN ELECTROLYTE TO FORM A MICROPOROUS LAYER OF OXIDE ADHERING STRONGLY TO THE METAL SURFACE FREE FROM ANY STRUCTURAL DEFECT AND THE OPPOSITE WALLS OF WHICH ARE PARALLEL TO EACH OTHER, MACHANICALLY SHAPING SAID SHEED SO AS TO FORM STIFFENING PROJECTIONS ON ONE FACE THEREOF AND TO GIVE THE AREAS OF SAID SHEET LOCATED BETWEEN SAID PROJECTIONS THE DESIRED THICKNESS THE OTHER FACE OF SAID SHEET BEING LEFT SMOOTH, AND SUBJACTING SAID SMOOTH FACE OF SAID SHEET TO AN OXIDIZING TREATMENT TO SUCH A DEGREE THAT SAID STIFFENING PROJECTIONS REMAIN UNOXIDIZED BUT THAT THE REMAINING THICKNESS OF THE SHEET SUBSTANTIALLY OXIDIZED.
References Cited (Backward Citations)
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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) | 1966-05-13 | 1966-11-12 | 1967-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-13 | 1970-11-12 | 1971-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-13 | 1974-11-12 | 1975-05-14 | $7700.00 | Window Closed / Lapsed |