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Patent US3139400A successfully refreshed from Google Patents.
US3139400A
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US
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Device for placing screens under tension
Assignee: Armstrong World Industries Inc
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Filing: 1961-12-15
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Granted: 1964-06-30
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Expires: 1981-12-15
Abstract
No abstract record available.
Inventors
- 👤 Joseph H Kyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:17
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/46; B07B1/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US489193A
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US2213773A
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US2279042A
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FR883576A
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US2345947A
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US2773700A
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US2845983A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |