US2887419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating
Assignee: National Research Corp
•
Filing: 1957-05-10
•
Granted: 1959-05-19
•
Expires: 1977-05-10
Abstract
No abstract record available.
Inventors
- 👤 Charles A Baer
- 👤 Wallace F Bugbee
- 👤 Philip J Clough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:20
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/06; C23C14/14; C23C14/16; C23C14/58; C23C14/5806; C23C14/5846; C23C14/5853; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12583; Y10T428/1259
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
THE PROCESS OF PRODUCING A SHINY, ADHERENT, CORROSION-RESISTANT ALUMINUM COATING ON BLACK IRON WHICH COMPRISES THE STEPS OF EXPOSING BLACK IRON TO A SOURCE OF ALUMINUM VAPORS IN A VACUUM CHAMBER MAINTAINED AT A PRESSURE ON THE ORDER OF 10 MICRONS HG ABS, AND LESS TO DEPOSIT ON THE BLACK IRON A FILM OF ALUMINUM HAVING A THICKNESS BETWEEN ABOUT 1 TO 30 MICROINCHES, AND THEREAFTER HEATING THE ALUMINUM-COATED BLACK IRON IN AN OXIDIZING ATMOSPHERE AT A TEMPERATURE ABOVE ABOUT 350*F. AND BELOW ABOUT 700*F., SAID HEATING BEING CONTINUED FOR AT LEAST A MINIMUM TIME RANGING BETWEEN A FEW SECONDS AT 700*F. TO A FEW MINUTES AT 350*F. AND BEING SUFFICIENTLY LONG TO FORM AN IRON ALUMINATE BOND BETWEEN THE BLACK IRON AND THE THIN ALUMINUM COATING.
Claim 2
Dependent Claim
127 words
THE PROCESS OF PRODUCING A SHINY, ADHERENT, CORROSION-RESISTANT ALUMINUM COATING ON BLACK IRON WHICH COMPRISES THE STEPS OF EXPOSING BLACK IRON TO A SOURCE OF ALUMINUM VAPORS IN A VACUUM CHAMBER MAINTAINED AT A PRESSURE ON THE ORDER OF 10 MICRONS HG ABS, AND LESS TO DEPOSIT ON THE BLACK IRON A FILM OF ALUMINUM HAVING A THICKNESS BETWEEN ABOUT 1 TO 30 MICROINCHES, AND THEREAFTER HEATING THE ALUMINUM-COATED BLACK IRON IN AN OXIDIZING ATMOSPHERE AT A TEMPERATURE ABOVE ABOUT 350*F. AND BELOW ABOUT 700*F., SAID HEATING BEING CONTINUED FOR AT LEAST A MINIMUM TIME RANGING BETWEEN A FEW SECONDS AT 700*F. TO A FEW MINUTES AT 350*F. AND BEING SUFFICIENTLY LONG TO FORM AN IRON ALUMINATE BOND BETWEEN THE BLACK IRON AND THE THIN ALUMINUM COATING.
References Cited (Backward Citations)
US2382432A
Cited
US2421719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |