Patent US2835634A successfully refreshed from Google Patents.
US2835634A
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US
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Polyethylene expansion material
Assignee: Antioch College
•
Filing: 1956-05-18
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Granted: 1958-05-20
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Expires: 1976-05-18
Abstract
No abstract record available.
Inventors
- 👤 Vernet Sergius
- 👤 Asakawa George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:01
CPC Classifications
G; G01; G01K; G01K5/00; G01K5/32; G01K5/44; C; C08; C08K; C08K3/00; C08K3/02; C08K3/08; Y; Y10; Y10S; Y10S33/00; Y10S33/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2115501A
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US2128274A
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US2259846A
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US2303348A
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US2265586A
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US2368182A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |