Patent US1968693A successfully refreshed from Google Patents.
US1968693A
Expired / Lapsed
US
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Apparatus for the production of glass silk
Assignee: Individual
•
Filing: 1931-05-27
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Granted: 1934-07-31
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Expires: 1951-05-27
Abstract
No abstract record available.
Inventors
- 👤 Kroger Otto Henry Amandus
- 👤 Oswald Otto Adolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:11
CPC Classifications
C; C03; C03B; C03B5/00; C03B5/02; C03B5/033; C03B5/0336; C03B37/00; C03B37/01; C03B37/02; C03B37/08; C03B37/081; C03B37/09; C03B37/091; F; F16; F16B; F16B21/00; F16B21/10; F16B21/16; F16B21/18; F16B21/183
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) | 1937-07-30 | 1938-01-29 | 1938-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-07-30 | 1942-01-29 | 1942-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-07-30 | 1946-01-29 | 1946-07-31 | $7700.00 | Window Closed / Lapsed |