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Patent US2401220A successfully refreshed from Google Patents.
US2401220A
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Method of forming sprayed layers
Assignee: STC PLC
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Filing: 1942-05-27
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Granted: 1946-05-28
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Expires: 1962-05-27
Abstract
No abstract record available.
Inventors
- 👤 Walter F Bonner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:18
CPC Classifications
H; H10; H10D; H10D48/00; H10D48/01; H10D48/04; H10D48/047; B; B05; B05C; B05C17/00; B05C17/06; H10D99/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-05-27 | 1949-11-26 | 1950-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-05-27 | 1953-11-26 | 1954-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-05-27 | 1957-11-26 | 1958-05-28 | $7700.00 | Window Closed / Lapsed |