US2848739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of and apparatus for making cellular plastic products
Assignee: AT&T Inc
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Filing: 1955-09-30
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Granted: 1958-08-26
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Expires: 1975-09-30
Abstract
No abstract record available.
Inventors
- 👤 George E Henning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:33
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/15; B29C48/03; B29C48/06; B29C48/25; B29C48/285; B29C48/288; B29C48/2888; B29C48/29; B29C48/36; B29C48/395; B29C48/445; B29C48/50; B29C48/505; B29C48/51; B29C48/515; B29K; B29K2105/00; B29K2105/0005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |