US2938643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closure
Assignee: Armstrong World Industries Inc
•
Filing: 1956-10-15
•
Granted: 1960-05-31
•
Expires: 1976-10-15
Abstract
No abstract record available.
Inventors
- 👤 Milton L Geiser
- 👤 George L Herr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:06
CPC Classifications
B; B65; B65D; B65D39/00; B65D39/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1033730A
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US1814141A
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GB519553A
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US2353674A
Cited
US2526225A
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GB653023A
Cited
US2669370A
Cited
US2657817A
Cited
US2690946A
Cited
US2738890A
Cited
FR1120713A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |