Patent US2176979A successfully refreshed from Google Patents.
US2176979A
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Pneumatic counterbalancing fixture
Assignee: Briggs Manufacturing Co
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Filing: 1936-07-27
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Granted: 1939-10-24
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Expires: 1956-07-27
Abstract
No abstract record available.
Inventors
- 👤 Henry T Platz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:02
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/30; B23K11/31; B23K11/318; B25; B25H; B25H1/00; B25H1/0021; B25H1/0028
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-10-23 | 1943-04-24 | 1943-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-10-23 | 1947-04-24 | 1947-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-10-23 | 1951-04-24 | 1951-10-24 | $7700.00 | Window Closed / Lapsed |