Patent US2821616A successfully refreshed from Google Patents.
US2821616A
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US
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Method and apparatus for making honeycomb material
Assignee: Individual
•
Filing: 1955-08-15
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Granted: 1958-01-28
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Expires: 1975-08-15
Abstract
No abstract record available.
Inventors
- 👤 Louis H Spott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:21
CPC Classifications
B; B21; B21D; B21D47/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1117770A
Cited
GB145672A
Cited
US2163590A
Cited
US2324435A
Cited
US2427597A
Cited
US2583575A
Cited
US2707826A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |