Patent US2732977A successfully refreshed from Google Patents.
US2732977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
charpiat
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
2026-10-24 13:37
CPC Classifications
B; B67; B67D; B67D1/00; B67D1/04; B67D1/0412; B67D1/08; B67D1/0857; B67D2210/00; B67D2210/00028; B67D2210/00128; B67D2210/00131
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US745876A
Cited
US1637635A
Cited
US1979323A
Cited
US1969960A
Cited
US2045009A
Cited
US2057068A
Cited
US2105339A
Cited
US2620107A
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 |