US209638A
Expired / Lapsed
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Improvement in gas-regulators
Assignee: —
•
Filing: —
•
Granted: 1878-11-05
•
Expires: 1895-11-05
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:41
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/36; F16K1/38; F16K1/44; F16K1/443; F16K31/00; F16K31/02; F16K31/06; F16K31/0644; F16K31/0655; F16K31/12; F16K31/126; F16K31/1266; F16K31/14; F16K31/145; G; G05; G05D; G05D16/00; G05D16/04; G05D16/06; G05D16/063; G05D16/0644; G05D16/0655; G05D16/0661; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7782; Y10T137/7793; Y10T137/7822; Y10T137/7823; Y10T137/7825; Y10T137/8593; Y10T137/87917; Y10T137/87981; Y10T137/87997; Y10T137/88005
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) | 1881-11-04 | 1882-05-06 | 1882-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1885-11-04 | 1886-05-06 | 1886-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1889-11-04 | 1890-05-06 | 1890-11-05 | $7700.00 | Window Closed / Lapsed |