Patent GB899618A successfully refreshed from Google Patents.
US2002761A
Expired / Lapsed
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Automatically controlled multiple valve for steam lines
Assignee: ARMSTRONG HEAT CONTROL Corp
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Filing: 1933-06-21
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Granted: 1935-05-28
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Expires: 1953-06-21
Abstract
No abstract record available.
Inventors
- 👤 Charles E Armstrong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:49
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/44; F16K31/52; F16K31/524; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86389; Y10T137/86405; Y10T137/86928; Y10T137/87016; Y10T137/87024; Y10T137/87265; Y10T137/87298; Y10T137/8741; Y10T137/87491; Y10T137/877; Y10T137/87708; Y10T137/87748
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) | 1938-05-27 | 1938-11-26 | 1939-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-05-27 | 1942-11-26 | 1943-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-05-27 | 1946-11-26 | 1947-05-28 | $7700.00 | Window Closed / Lapsed |