US2939509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic corrugating process and machine
Assignee: FIBER GLASS PLASTIC Inc
•
Filing: 1952-11-20
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Granted: 1960-06-07
•
Expires: 1972-11-20
Abstract
No abstract record available.
Inventors
- 👤 Paul H Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:14
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/22; B29C53/24; B29C53/28; B29C53/285; B29K; B29K2105/00; B29K2105/06; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1016; Y10T156/1018; Y10T156/102; Y10T156/12; Y10T156/1348; Y10T156/1352; Y10T156/1357; Y10T156/17; Y10T156/1798
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1195408A
Cited
US2631955A
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US2496911A
Cited
US2526945A
Cited
US2623266A
Cited
US2547880A
Cited
US2695652A
Cited
US2663351A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |