Patent US3219108A successfully refreshed from Google Patents.
US3219108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of propynol in chemical ignition
Assignee: Dow Chemical Co
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Filing: 1962-11-14
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Granted: 1965-11-23
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Expires: 1982-11-14
Abstract
No abstract record available.
Inventors
- 👤 Roger F Monroe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:35
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; E21B43/243
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
THE METHOD OF IGNITING A CARBONACEOUS SUBSTANCE BY BRINGING P2O5 AND PROPYNOL INTO CONTACT WITH EACH OTHER AND WITH SAID SUBSTANCE IN THE PRESENCE OF A COMBUSTIONSUPPORTING GAS AT ANY AMBIENT TEMPERATURE AT WHICH THE PROPYNOL IS A LIQUID.
Claim 2
Independent Claim
39 words
THE METHOD OF IGNITING A CARBONACEOUS SUBSTANCE BY BRINGING P2O5 AND PROPYNOL INTO CONTACT WITH EACH OTHER AND WITH SAID SUBSTANCE IN THE PRESENCE OF A COMBUSTIONSUPPORTING GAS AT ANY AMBIENT TEMPERATURE AT WHICH THE PROPYNOL IS A LIQUID.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |