Patent US2453726A successfully refreshed from Google Patents.
Patent US2732591A successfully refreshed from Google Patents.
US2732591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
whittum
Assignee: —
•
Filing: —
•
Granted: 1956-01-31
•
Expires: 1973-01-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:40
CPC Classifications
D; D21; D21G; D21G1/00; D21G1/002; D21G1/0026; B; B21; B21B; B21B27/00; B21B27/02; B29; B29C; B29C43/00; B29C43/22; B29C43/24; B21B2267/00; B21B2267/18; B21B2267/19; Y; Y10; Y10S; Y10S425/00; Y10S425/235; Y10S56/00; Y10S56/01; Y10S72/00; Y10S72/701
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US242532A
Cited
US444746A
Cited
US831727A
Cited
US856885A
Cited
GB268705A
Cited
US2187250A
Cited
US2671296A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-30 | 1959-08-01 | 1960-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-30 | 1963-08-01 | 1964-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-30 | 1967-08-01 | 1968-01-31 | $7700.00 | Window Closed / Lapsed |