Patent US3485660A successfully refreshed from Google Patents.
US3485660A
Expired / Lapsed
US
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Heat resistant polypropylene
Assignee: United States Department of the Army
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Filing: 1966-02-15
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Granted: 1969-12-23
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Expires: 1986-02-15
Abstract
No abstract record available.
Inventors
- 👤 Friedrich J O Engelhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:17
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/04; C08J7/0427; C08J7/16; C08J2323/00; C08J2323/26; C08J2323/30; C08J2351/00; C08J2483/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663; Y10T428/31667; Y10T428/31855
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) | 1972-12-22 | 1973-06-23 | 1973-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-22 | 1977-06-23 | 1977-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-22 | 1981-06-23 | 1981-12-23 | $7700.00 | Window Closed / Lapsed |