Patent DE907141C successfully refreshed from Google Patents.
US3544356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the surface treatment of aluminum and its alloys
Assignee: AT&T Inc
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Filing: 1967-11-01
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Granted: 1970-12-01
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Expires: 1987-11-01
Abstract
No abstract record available.
Inventors
- 👤 Hargovind N Vazirani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:45
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/02; C11D7/04; C11D7/10; C11D3/00; C11D3/0005; C11D3/0042; C23; C23G; C23G1/00; C23G1/02; C23G1/12; C23G1/125; C11D2111/00; C11D2111/10; C11D2111/14; C11D2111/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2409271A
Cited
US3455775A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |