US3106441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making preforms or blanks from polyethylene
Assignee: WR Grace and Co
•
Filing: 1960-01-04
•
Granted: 1963-10-08
•
Expires: 1980-01-04
Abstract
No abstract record available.
Inventors
- 👤 John W Harrison
- 👤 Robert D Lowry
- 👤 Jr William G Baird
- 👤 Robert G Shaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:44
CPC Classifications
B; B29; B29B; B29B11/00; B29C; B29C2949/00; B29C2949/07; B29C2949/081; B29C2949/0811; Y; Y10; Y10S; Y10S215/00; Y10S215/90; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1043; Y10T156/1052; Y10T156/1084; Y10T156/1085
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB444815A
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US2315478A
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US2811818A
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US2872763A
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US2877500A
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US2866488A
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US2937481A
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US2976655A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-10-07 | 1967-04-08 | 1967-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-07 | 1971-04-08 | 1971-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-07 | 1975-04-08 | 1975-10-08 | $7700.00 | Window Closed / Lapsed |