Patent US2931421A successfully refreshed from Google Patents.
US2931421A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the production of a thin sheet or mat from glass fibres
Assignee: Individual
•
Filing: 1953-07-07
•
Granted: 1960-04-05
•
Expires: 1973-07-07
Abstract
No abstract record available.
Inventors
- 👤 Schuller Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:05
CPC Classifications
D; D04; D04H; D04H5/00; D04H5/08; D04H1/00; D04H1/40; D04H1/42; D04H1/4209; D04H1/4218; D04H1/4226; D04H1/58; D04H1/64; D04H1/645; D04H1/655; D04H1/70; D04H1/74; D04H5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2732885A
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US1811416A
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US2152901A
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US2314944A
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US2215150A
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US2504744A
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US2460899A
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US2528091A
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US2584517A
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US2639759A
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US2648876A
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US2621444A
Cited
US2653416A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |