US2819994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous and foamy spongelike materials
Assignee: Individual
•
Filing: 1955-07-22
•
Granted: 1958-01-14
•
Expires: 1975-07-22
Abstract
No abstract record available.
Inventors
- 👤 Thurlow G Gregory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:55
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/02; B29C44/12; B29C44/1266; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24058; Y10T428/31504; Y10T428/31826
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1427754A
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US1884106A
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FR804987A
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US2159213A
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US2140063A
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US2280022A
Cited
US2273313A
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US2298986A
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US2409660A
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US2719795A
Cited
US2740402A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-13 | 1961-07-15 | 1962-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-13 | 1965-07-15 | 1966-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-13 | 1969-07-15 | 1970-01-14 | $7700.00 | Window Closed / Lapsed |