US3445217A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite tweel with internal suspension system
Assignee: Pilkington Group Ltd
•
Filing: 1966-10-25
•
Granted: 1969-05-20
•
Expires: 1986-10-25
Abstract
No abstract record available.
Inventors
- 👤 George Alfred Dickinson
- 👤 Charles Fitzroy Griffith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:32
CPC Classifications
C; C03; C03B; C03B18/00; C03B18/02; C03B18/04; C03B5/00; C03B5/16; C03B5/26; C03B5/265; C03B5/267
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1321752A
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US1322767A
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US1906695A
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US2444731A
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US2677003A
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US2777254A
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US3137559A
Cited
US3351452A
Cited
US3342574A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-19 | 1972-11-18 | 1973-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-19 | 1976-11-18 | 1977-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-19 | 1980-11-18 | 1981-05-20 | $7700.00 | Window Closed / Lapsed |