Patent US2993956A successfully refreshed from Google Patents.
US2750833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inven tor
Assignee: —
•
Filing: —
•
Granted: 1956-06-19
•
Expires: 1973-06-19
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:09
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10036; G; G02; G02B; G02B23/00; G02B27/00; G02B27/01; G02B27/0101; G02B27/28; G02B27/281; B60; B60K; B60K2360/00; B60K2360/20; B60K2360/33; B60K2360/334; G02B2027/0118; G02B2027/012; G02B27/0149; G02B2027/0169; G02B5/00; G02B5/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2237565A
Cited
US2394521A
Cited
US1834017A
Cited
US2018963A
Cited
US2102632A
Cited
US2155436A
Cited
US2119577A
Cited
US2214802A
Cited
US2264044A
Cited
US2323059A
Cited
US2396902A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-19 | 1959-12-19 | 1960-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-19 | 1963-12-19 | 1964-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-19 | 1967-12-19 | 1968-06-19 | $7700.00 | Window Closed / Lapsed |