Patent US3061923A successfully refreshed from Google Patents.
US3061923A
Expired / Lapsed
US
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Method of making composite sheets
Assignee: Knapp Mills Inc
•
Filing: 1959-05-11
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Granted: 1962-11-06
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Expires: 1979-05-11
Abstract
No abstract record available.
Inventors
- 👤 Victor E Knapp
- 👤 Neil F Ritchey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:58
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/22; B23K20/233
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-05 | 1966-05-07 | 1966-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-05 | 1970-05-07 | 1970-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-05 | 1974-05-07 | 1974-11-06 | $7700.00 | Window Closed / Lapsed |