Patent US2987294A successfully refreshed from Google Patents.
US2987294A
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Assignee: Babson Brothers Co
•
Filing: 1957-12-23
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Granted: 1961-06-06
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Expires: 1977-12-23
Abstract
No abstract record available.
Inventors
- 👤 Thomas W Merritt
- 👤 Chester A Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:39
CPC Classifications
F; F16; F16L; F16L41/00; F16L41/08; F16L41/16; F16K; F16K51/00; F16L41/04; F16L41/06; F16L41/12
Claims Analysis
Total Claims: 0
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US2779608A
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US2881010A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |